DTM CORP /TX/
S-1/A, 1997-02-19
SPECIAL INDUSTRY MACHINERY, NEC
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<PAGE>
 
   
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 19, 1997     
                                                     REGISTRATION NO. 333-04173
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
 
                               ----------------
                                AMENDMENT NO. 1
                                      TO
                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                                DTM CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
          TEXAS                      3559                     74-248705
     (STATE OR OTHER     (PRIMARY STANDARD INDUSTRIAL     (I.R.S. EMPLOYER
     JURISDICTION OF      CLASSIFICATION CODE NUMBER)    IDENTIFICATION NO.)
    INCORPORATION OR
      ORGANIZATION)
                               ----------------
                              1611 HEADWAY CIRCLE
                                  BUILDING 2
                              AUSTIN, TEXAS 78754
                                (512) 339-2922
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
                               ----------------
                                  
                               UDAY BELLARY     
                              1611 HEADWAY CIRCLE
                                  BUILDING 2
                              AUSTIN, TEXAS 78754
                                (512) 339-2922
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                  INCLUDING AREA CODE, OF AGENT FOR SERVICE)
                               ----------------
                                  COPIES TO:
 
     SONJA M. HALLER           DEREK R. MCCLAIN             JOHN T. KIPP
THE B.F.GOODRICH COMPANY    VINSON & ELKINS L.L.P.     GARDERE & WYNNE, L.L.P.
                           3700 TRAMMELL CROW CENTER       1601 ELM STREET
   4020 KINROSS LAKES          2001 ROSS AVENUE              SUITE 3000
      PARKWAY     
                           DALLAS, TEXAS 75201-2975   DALLAS, TEXAS 75201-4761
 RICHFIELD, OHIO 44286-         (214) 220-7700             (214) 999-3000
        9368
   (216) 659-7714     
 
                               ----------------
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this registration statement.
                               ----------------
  If any of the Securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box: [_]
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
                               ----------------
                      CALCULATION OF THE REGISTRATION FEE
<TABLE>     
<CAPTION> 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                                                       PROPOSED
                                          PROPOSED      MAXIMUM
 TITLE OF EACH CLASS OF     AMOUNT        MAXIMUM      AGGREGATE   AMOUNT OF
    SECURITIES TO BE         TO BE     OFFERING PRICE  OFFERING   REGISTRATION
       REGISTERED        REGISTERED(1)  PER SHARE(2)   PRICE(2)       FEE
- ------------------------------------------------------------------------------
<S>                      <C>           <C>            <C>         <C>
Common Stock, par value
 $.0002 per share......    2,808,300       $13.00     $36,507,900  $12,558(3)
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
</TABLE>      
   
(1) Includes 255,300 shares which the underwriters have an option to purchase
    to cover over-allotments, if any.     
(2) Estimated solely for the purpose of calculating the registration fee
    pursuant to Rule 457(a).
   
(3) Paid with the initial filing of the registration statement on May 21,
    1996.     
                               ----------------
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY SUCH STATE.                                                               +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                 
              SUBJECT TO COMPLETION, DATED FEBRUARY 19, 1997     
                                
                             2,553,000 SHARES     
 
                                DTM CORPORATION
 
                                  COMMON STOCK
 
                                  -----------
   
  Of the 2,553,000 shares of DTM Corporation common stock (the "Common Stock")
offered hereby (the "Offering"), 2,300,248 shares are being sold by DTM
Corporation (the "Company" or "DTM") and 252,752 shares are being sold by the
selling shareholders identified in "Principal and Selling Shareholders" (the
"Selling Shareholders"). The Company will receive no proceeds from Common Stock
sold by the Selling Shareholders.     
   
  Prior to the Offering, there has been no public market for the Common Stock.
It is anticipated that the Offering price of Common Stock will be between
$11.00 and $13.00 per share. See "Underwriting" for information relating to
factors considered in determining the Offering price. The Company has made
application for quotation and trading of the Common Stock on the Nasdaq
National Market under the symbol "DTMC."     
   
  SEE "RISK FACTORS" BEGINNING AT PAGE 6 FOR A DISCUSSION OF CERTAIN FACTORS
THAT SHOULD BE CONSIDERED IN CONNECTION WITH AN INVESTMENT IN THE COMMON STOCK.
    
                                  -----------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
                                  -----------
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                   PROCEEDS TO
                               PRICE TO UNDERWRITING PROCEEDS TO     SELLING
                                PUBLIC  DISCOUNT(1)  COMPANY(2)  SHAREHOLDERS(2)
- --------------------------------------------------------------------------------
<S>                            <C>      <C>          <C>         <C>
Per Share....................    $          $           $             $
- --------------------------------------------------------------------------------
Total(3).....................    $          $           $             $
</TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(1) The Company and the Selling Shareholders have agreed to indemnify the
    Underwriters against certain liabilities, including liabilities under the
    Securities Act of 1933, as amended. See "Underwriting."
(2) Before deducting expenses of the Offering to be paid by the Company and the
    Selling Shareholders, estimated at $     and $   , respectively.
   
(3) The B.F. Goodrich Company has granted the Underwriters a 30-day option to
    purchase up to 255,300 additional shares of Common Stock at the Price to
    Public per share less the Underwriting Discount solely to cover over-
    allotments, if any. If such option is exercised in full, the total Price to
    Public, Underwriting Discount, Proceeds to Company and Proceeds to Selling
    Shareholders will be $   , $   , $    and $   , respectively. See
    "Underwriting."     
 
                                  -----------
   
  The Common Stock is offered by the Underwriters, subject to prior sale, when,
as and if issued to and accepted by them and subject to certain conditions. The
Underwriters reserve the right to withdraw, cancel or modify such offer and to
reject orders, in whole or in part. It is expected that delivery of the shares
of Common Stock will be made on or about       , 1997.     
   
A.G. EDWARDS & SONS, INC.                     LADENBURG THALMANN & CO. INC.     
                  
               The date of this Prospectus is       , 1997.     
<PAGE>
 
 
 
 
  IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK
AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH
TRANSACTIONS MAY BE EFFECTED ON THE NASDAQ NATIONAL MARKET OR OTHERWISE. SUCH
STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
                                       2
<PAGE>
 
                               PROSPECTUS SUMMARY
   
  THE FOLLOWING SUMMARY SHOULD BE READ WITH AND IS QUALIFIED IN ITS ENTIRETY BY
THE MORE DETAILED INFORMATION AND FINANCIAL STATEMENTS AND NOTES THERETO
APPEARING ELSEWHERE IN THIS PROSPECTUS. INVESTORS SHOULD CAREFULLY CONSIDER THE
RISK FACTORS RELATED TO THE PURCHASE OF COMMON STOCK. SEE "RISK FACTORS."
UNLESS OTHERWISE INDICATED, THE INFORMATION CONTAINED IN THIS PROSPECTUS
ASSUMES THAT THERE HAS BEEN NO EXERCISE OF THE UNDERWRITERS' OVER-ALLOTMENT
OPTION AND REFLECTS AN EFFECTIVE 1.365-FOR-1 STOCK SPLIT EFFECTED AS A SERIES
OF RECAPITALIZATIONS COMPLETED IN FEBRUARY 1997. SUCH STOCK SPLIT HAS BEEN
RETROACTIVELY APPLIED TO ALL SHARE AND PER SHARE AMOUNTS CONTAINED HEREIN.
UNLESS THE CONTEXT OTHERWISE REQUIRES, REFERENCES IN THIS PROSPECTUS TO "DTM"
AND THE "COMPANY" REFER TO DTM CORPORATION AND ITS SUBSIDIARY ON A CONSOLIDATED
BASIS. "DTM," "PROTOFORM," "RAPIDSTEEL," "RAPIDTOOL," "SANDFORM,"
"SINTERSTATION(R)," "SLS(R)" AND "TRUEFORM" ARE TRADEMARKS OR SERVICE MARKS OF
DTM CORPORATION. "SOMOS(R)" IS A TRADEMARK OF E.I. DUPONT DE NEMOURS AND
COMPANY ("DUPONT").     
 
                                  THE COMPANY
   
  DTM Corporation develops, designs, manufactures, markets and supports, on an
international basis, rapid prototyping and rapid tooling systems, powdered
materials and related services. The Company's selective laser sintering systems
("Systems") and materials are based on proprietary and patented selective laser
sintering technology. Rapid prototyping is the creation of a solid three-
dimensional model, prototype or pattern directly from three-dimensional
computer aided design ("CAD") data. Rapid tooling is the creation of durable
tooling from CAD data that can be subsequently employed to produce substantial
quantities of parts for market introduction of a product. Use of the Company's
SLS Systems significantly reduces the time required to produce models and
prototypes for testing actual product fit and form, ergonomic design and
functionality from what otherwise could be months or weeks to days or, in some
cases, hours. The Company's SLS Systems are used to accelerate the design,
development and market introduction of products in a wide range of industries,
including but not limited to the automotive, aerospace, medical, electronics,
telecommunications, computer, appliance, footwear, toy and power tool
industries. The B.F. Goodrich Company ("BFGoodrich") currently owns
approximately 92 percent of the outstanding Common Stock.     
   
  The Company has experienced substantial sales growth since the sale of its
first commercial SLS System, the Sinterstation 2000, in December 1992. Sales of
Sinterstation Systems, powdered materials and related services have increased
each year. As of December 31, 1996, the Company had sold 136 SLS Systems and
placed an additional two SLS Systems through a rental program resulting in a
total of 138 SLS Systems shipped worldwide. Revenue has increased from
approximately $1.1 million in 1991 to approximately $24.4 million in 1996, a
level that the Company believes makes it the second largest industry
participant as measured by revenues. The Company attributes its revenue growth
primarily to the increasing worldwide acceptance of rapid prototyping as a
technology capable of accelerating development and design of new products, as
well as the refinement of its selective laser sintering process to a level
which affords users distinct advantages over other rapid prototyping
technologies.     
   
  Since the 1980s, the field of product engineering, design and development has
undergone rapid change with ever-increasing emphasis on time to market as a key
factor in successful product introduction. The rapid prototyping industry has
arisen as a part of, and in response to, this change. According to the most
recent data published by industry analysts Wohlers Associates, the estimated
worldwide market for rapid prototyping goods and services in 1995 was
approximately $295 million, a 50 percent increase over 1994. Wohlers Associates
projects that the industry will grow at a compound annual rate of approximately
49 percent for the years 1996 and 1997, reaching a size of over $650 million.
    
  The selective laser sintering rapid prototyping process employed by the
Company replicates a CAD model by using laser energy to convert heat-fusible
powders into three-dimensional solid objects within DTM's commercial SLS
Systems. A focused carbon dioxide laser beam melts and bonds ("sinters") the
surface of a bed of powder into a solid horizontal cross-section of the object
being modeled. Subsequent powder layers are deposited, sintered and bonded to
the previous layer as the energy from the laser beam fuses sequential layers
together. This layered manufacturing process is continued until the CAD model
has been fully replicated as a plastic part or metal tool insert. Upon
completion of the part build, the excess, or unsintered, plastic or metal
powder is removed for use in subsequent part builds. The Company either owns or
has exclusive licenses under various patents covering the technology utilized
in its SLS Systems and related products.
          
  DTM believes that its SLS Systems have distinct advantages relative to
competing rapid prototyping technologies. SLS Systems have the ability to (i)
process multiple powdered materials for a wide range of     
 
                                       3
<PAGE>
 
   
applications, (ii) produce strong and durable functional plastic prototypes
that can be drilled, painted, equipped with electronics and mounted in working
product assemblies that duplicate the final product, (iii) rapidly produce
prototype metal mold inserts from metal powder, thereby significantly reducing
the time required to manufacture prototype tooling, (iv) build parts more
quickly by sequencing and stacking multiple parts in a single production run
and (v) accommodate new powdered plastic, metal and ceramic materials and
expanded applications.     
   
  Past purchasers of the Company's SLS Systems include The Boeing Company,
Eastman Kodak Company, Fiskars Oy, Ford Motor Company, General Motors
Corporation, Hughes Christensen, LG Electronics, Inc. (Goldstar), Mercedes-Benz
AG, Pratt & Whitney, Rockwell International Corporation, Samsung Electronics
Co., Ltd., Toyota Motor Corporation and Whirlpool Corporation, among others.
The Company also sells a substantial portion of its SLS Systems to service
bureaus, which are businesses that use rapid prototyping technology to
fabricate and sell models and prototype parts.     
   
  DTM has devoted substantial effort to developing what it believes is a
leading position in the high end of the rapid prototyping industry and to
protecting its intellectual property rights. In the last two years, the Company
has introduced four new powdered sintering materials, a new tooling process and
a new Sinterstation System. The Company introduced ProtoForm powder in 1995,
which is specifically designed for the production of strong and durable
functional plastic prototypes. During 1995, the Company also introduced the
RapidTool process and RapidSteel powder, which allow customers who desire
multiple parts in their material of choice to directly create metal mold
inserts for injection mold tooling. The Company believes that, with the
introduction of its TrueForm powder in early 1996, it provides the most
effective solution for the rapid creation of patterns for investment casting.
Also in 1996 the Company introduced SandForm powder, a sand-based material that
enables foundries to create sand cores (without tooling) that can be used in
the sand casting of metal parts. The Company recently announced the expected
availability of two new powders: Somos 201 powder, a new material supplied by
DuPont that yields highly flexible parts with rubber-like characteristics, and
VeriForm powder, a significantly improved material for functional prototypes.
These developments continue to expand the potential end uses for rapid
prototyping from the original concept models to more functional plastic and
metal parts. The Company believes that its selective laser sintering technology
is the only commercially practiced rapid prototyping process that allows a user
to access all of these capabilities from a single platform. The Company
believes that it further expanded the potential end user market with the
September 1996 introduction of the Sinterstation 2500 System, a new
Sinterstation System with twice the build volume of the original System and
with a significantly higher scan speed.     
   
  The Company believes that it is positioned to capitalize on its competitive
advantages and increase its share of the rapid prototyping market through the
following strategies: (i) using its ProtoForm powder to increase the Company's
SLS System and materials sales for strong durable part applications; (ii)
targeting the RapidTool process, the TrueForm powder, and the SandForm powder
to the growing rapid prototyping markets of metal prototype tools, investment
cast parts, and sand cast parts; (iii) developing and marketing new and
improved metal, plastic and ceramic powdered materials; (iv) continuing to
significantly upgrade the performance of the Sinterstation Systems in both
productivity and accuracy; and (v) expanding the Company's distribution
network, including the Company's direct sales force and agent network.     
 
                                  THE OFFERING
 
<TABLE>   
<S>                                <C>
Common Stock offered by the
 Company.......................... 2,300,248 Shares
Common Stock offered by the
 Selling Shareholders.............   252,752 Shares
Common Stock to be outstanding
 after the Offering............... 7,293,981 Shares(1)
Risk Factors...................... The Offering involves a high degree of risk
                                   and immediate and substantial dilution. See
                                   "Risk Factors" and "Dilution."
Use of Proceeds................... To retire existing indebtedness and for
                                   general corporate purposes. See "Use of
                                   Proceeds."
Proposed Nasdaq National Market
 symbol........................... DTMC
</TABLE>    
- --------
   
(1) Based upon the number of shares outstanding as of February 15, 1997.
    Includes an estimated 662,486 shares of Common Stock issuable to employees
    upon the exercise of immediately exercisable stock options that will be
    outstanding in connection with the closing of the Offering under the DTM
    Corporation Equity Appreciation Plan. See "Management--Equity Appreciation
    Plan."     
 
                                       4
<PAGE>
 
               SUMMARY CONSOLIDATED FINANCIAL AND OPERATING DATA
          (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AND OPERATING DATA)
 
<TABLE>   
<CAPTION>
                                             YEAR ENDED DECEMBER 31,
                              -------------------------------------------------
                                1992      1993      1994      1995      1996
                              --------  --------  --------  --------  ---------
<S>                           <C>       <C>       <C>       <C>       <C>
STATEMENTS OF OPERATIONS
 DATA:
 Revenue:
 Products...................  $  2,841  $  6,989  $  8,127  $ 12,632  $  22,070
 Service and support(1).....     2,027     2,593     1,112     1,579      2,309
                              --------  --------  --------  --------  ---------
  Total revenue.............     4,868     9,582     9,239    14,211     24,379
 Cost of sales:
 Products...................     2,462     5,699     5,370     8,803     13,021
 Service and support........     1,705     2,141       511       873      1,424
                              --------  --------  --------  --------  ---------
  Total cost of sales.......     4,167     7,840     5,881     9,676     14,445
                              --------  --------  --------  --------  ---------
 Gross profit...............       701     1,742     3,358     4,535      9,934
 Operating loss.............    (9,624)   (9,644)   (5,731)   (5,606)    (4,338)
 Interest expense, net......       (10)     (328)     (178)     (530)    (1,066)
 Cost of discontinued
  registration..............       --        --        --        --        (752)
 Income tax benefit
  allocated from
  BFGoodrich................     3,032     3,084     1,825     2,138      1,667
 Net loss...................  $ (6,602) $ (6,650) $ (4,084) $ (3,998) $  (4,489)
                              ========  ========  ========  ========  =========
Pro forma(2):
 Net loss...................                                          $  (6,156)
                                                                      =========
 Net loss per share.........                                          $   (1.29)
                                                                      =========
 Number of shares used(3)...                                          4,774,718
                                                                      =========
OPERATING DATA(4):
 SLS Systems sold or
  rented....................         9        19        23        36         51
 Cumulative SLS Systems sold
  or rented.................         9        28        51        87        138
</TABLE>    
 
<TABLE>   
<CAPTION>
                                                          DECEMBER 31, 1996
                                                      --------------------------
                                                      ACTUAL   AS ADJUSTED(3)(5)
                                                      -------  -----------------
<S>                                                   <C>      <C>
BALANCE SHEET DATA:
 Working capital..................................... $ 1,622       $11,685
 Total assets........................................  17,897        27,191
 Total debt..........................................  15,809           --
 Total liabilities...................................  26,382        10,573
 Shareholders' equity (deficit)......................  (8,485)       16,618
</TABLE>    
- --------
   
(1) Includes domestic rapid prototyping service bureau activity through
    December 1993, at which time the Company sold its domestic service bureau.
    Revenues associated with the service bureau operations for the years ended
    December 31, 1992 and 1993 totaled approximately $1.9 million for each
    year.     
(2) Computed on a stand-alone basis, without allocation of income tax benefit
    from BFGoodrich.
   
(3) Gives effect to the issuance of an estimated 538,146 shares of Common Stock
    issuable to employees upon the exercise of immediately exercisable options,
    certain of which will have exercise prices substantially less than the
    assumed Offering price of $12.00 per share, that will be outstanding in
    connection with the closing of the Offering under the DTM Corporation
    Equity Appreciation Plan. See "Management--Equity Appreciation Plan."     
          
(4) Includes the rental of four SLS Systems during the year ended December 31,
    1995. Two of such rental Systems were converted to sales during the year
    ended December 31, 1995.     
   
(5) Reflects the sale of 2,300,248 shares of Common Stock by the Company at an
    assumed Offering price of $12.00 per share, less estimated underwriting
    discount, offering expenses and the application of the net proceeds to the
    Company therefrom. See "Use of Proceeds" and "Capitalization."     
 
                                       5
<PAGE>
 
                                 RISK FACTORS
 
  In addition to the other information in this Prospectus, the following
factors should be considered carefully in evaluating the Company and its
business and prospects before purchasing any shares of Common Stock offered
hereby.
   
  LIMITED OPERATING HISTORY AND LACK OF PROFITABILITY. The Company was
incorporated in 1987, and prior to shipment of its first SLS Systems in 1992,
it derived revenues solely from a rapid prototyping service bureau that it
operated in Austin, Texas. The Company has been unprofitable from its
inception, most recently recognizing a net loss of approximately $4.5 million
for the year ended December 31, 1996. There can be no assurance that the
Company can achieve or maintain profitability in the future. During the
quarter and year in which it becomes probable that the Offering will occur,
the Company will incur non-recurring, non-cash compensation expense as a
result of the conversion of phantom stock appreciation rights outstanding
under the DTM Corporation Equity Appreciation Plan (the "Equity Appreciation
Plan") into immediately exercisable options to acquire shares of Common Stock,
certain of which are at exercise prices substantially less than the Offering
price. Assuming an Offering price of $12.00 per share, operating results for
the quarter and year would be adversely affected by such non-cash compensation
expense of approximately $5.3 million, resulting in a substantial reported net
loss. See "Management--Equity Appreciation Plan."     
   
  MANAGEMENT OF GROWTH. DTM has experienced rapid sales growth since 1991,
recognizing increases in total net revenues from approximately $1.1 million in
1991 to approximately $24.4 million in 1996. This growth has, from time to
time, strained its management resources and systems. DTM's ability to manage
its growth effectively will depend on, among other things, its ability to
increase the capability and quality of its operational, financial and
management information systems and controls and to train, motivate and manage
a larger number of employees. There is no assurance that the Company will be
successful in managing any future growth. Failure to do so could have a
material adverse affect on the Company's business and financial performance.
    
  INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS. Protection of the Company's
intellectual property is an important factor in its ability to be successful
in a highly competitive market that is subject to rapid technological changes.
In pursuing protection for its proprietary rights in its SLS Systems,
materials and related technology, the Company currently relies on a
combination of patent, copyright, trademark and trade secret rights, as well
as contractual provisions. The Company typically seeks patent protection for
its selective laser sintering technology, including, where deemed appropriate,
the selective laser sintering process, the SLS Systems and the materials used
in the SLS Systems. However, patent protection may not always be available.
There can be no assurance that patents will be issued under any or all of the
patent applications to which the Company has rights. In addition, the laws of
various countries in which the Company's products may be sold may not protect
the Company's products and intellectual property rights to the same extent as
the laws of the United States.
   
  Furthermore, the Company can give no assurance that the issued patents to
which it holds rights will be adequate to protect its interests or, if
challenged, held valid. The Company's competitors could develop non-infringing
systems, materials or technologies that are equivalent or superior to those of
the Company. Competitors also may practice technology covered by DTM's patents
or other legal or contractual protection regardless of the fact that it is
legally protected, forcing the Company to engage in costly litigation to
defend its interests. The Company is currently engaged in patent infringement
litigation with a German competitor concerning the competitor's sale in Europe
of rapid prototyping systems that DTM believes infringe a European patent
under which DTM has exclusive rights. In response, this competitor has
instituted proceedings in the European Patent Office challenging the validity
of the patent in question. The Company has received a favorable initial ruling
from the European Patent Office. However, the opponent has filed papers with
the European Patent Office asserting new arguments that the patent is invalid.
DTM continues to defend its interest in this proceeding and has responded to
this new filing. DTM is also engaged in litigation in the United States
against two related companies and their president concerning those companies'
alleged infringement of a DTM patent. One of the parties has asserted claims
in this proceeding against DTM and BFGoodrich for violation of state and
federal antitrust laws, as well as patent misuse. DTM and BFGoodrich have
denied the latter allegations. While DTM     
 
                                       6
<PAGE>
 
   
defends its intellectual property vigorously, there can be no assurance that
it will be successful in this litigation. If the Company were unsuccessful in
enforcing its intellectual property rights or other contractual rights in the
context of third-party offers to sell SLS Systems or powders or if the Company
were found to have violated state or federal antitrust laws, the Company's
future revenues might be adversely affected. The inability of the Company to
successfully establish and defend its intellectual property rights could have
a material adverse effect on the Company's business and financial performance.
See "Business--Intellectual Property" and "--Legal Proceedings."     
   
  Unrelated third parties hold many patents and pending patent applications
under which the Company is not a licensee that relate to the design and
manufacture of rapid prototyping systems and materials. If such a third party
brought infringement litigation against the Company, and if the Company was
not successful in defending such litigation or in obtaining a license, the
Company's business and financial performance could be materially adversely
affected.     
   
  Certain key intellectual property used in the selective laser sintering
process is licensed to the Company by The University of Texas System ("The
University of Texas"). As a licensee, the Company's rights to practice the
technology are not absolute. The University of Texas could terminate, attempt
to terminate or amend the license if the Company could be shown to be in
material default of the terms of the license. Even if DTM has a basis for
objection, defense of its rights as a licensee could be costly and the outcome
would be uncertain. Loss of significant rights as a licensee under this
license could have a material adverse effect on the Company's business and
financial performance. See "Business--Intellectual Property."     
   
  QUARTERLY FLUCTUATIONS IN OPERATING RESULTS. The Company's revenues and
operating results have varied substantially from quarter to quarter and may
continue to do so. DTM typically experiences a relatively long lead time to
complete an SLS System sale and has historically experienced little or no
backlog. Furthermore, new product introductions, seasonality of customer
buying patterns and other factors can cause fluctuations in quarterly results.
These fluctuations may preclude the Company from managing its operating
results effectively from quarter to quarter. The failure of the Company to
complete a particular SLS System sale in any given quarter can have a material
adverse effect on the Company's business and financial performance for that
quarter and quarterly fluctuations could cause a material adverse effect on
the price at which the Common Stock trades. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Selected Quarterly
Results" and "--Seasonality."     
          
  CAPITAL RESOURCES. The Company's future capital requirements will depend on
a number of factors, including its profitability, growth rate, working capital
requirements associated with increased sales, expenses associated with
protection of its patents and other intellectual property and costs of future
research and development activities. BFGoodrich, the Company's majority
shareholder, has been a significant source of debt and equity funding in the
past. However, BFGoodrich has indicated to the Company that it believes there
will not be a need for it to provide funding in the future and that BFGoodrich
has no plans to provide such funding following completion of the Offering.
Future operating results will depend, in part, on the Company's ability to
obtain and manage capital sufficient to finance its business. The inability of
the Company to secure capital funding sufficient to meet its needs could have
a material adverse effect on the Company's business and financial performance.
       
  In February 1997, the Company obtained a loan commitment letter from Texas
Commerce Bank for a revolving line of credit ("line of credit") contingent
upon the successful completion of the Offering, retirement of existing bank
and BFGoodrich indebtedness and negotiation and execution of mutually
acceptable definitive documentation. Assuming a line of credit is established
with the terms set forth in the commitment letter, the Company's ability to
borrow thereunder will be subject to a borrowing base calculation and the
Company meeting certain financial thresholds, including attaining certain
levels of "established profitability," as defined therein. Until achieving one
such level, the Company would be permitted to borrow up to $3.0 million;
thereafter, available advances against eligible receivables would be increased
up to a maximum of $6.0 million. Loans under the line of credit would mature
within one year, would be collateralized by the Company's accounts receivable
and inventory and would bear interest at the bank's prime interest rate plus
three quarters of one percent. The     
 
                                       7
<PAGE>
 
   
commitment provides that the Company would be bound by customary covenants,
including restrictions on additional liens or borrowings, as well as the
payment of dividends, and affirmative reporting requirements. In addition, the
terms of the commitment letter specify that the bank would have the option to
terminate the obligation to make further advances under the line of credit on
30 days notice if employment of the chief executive officer of the Company
terminates and a qualified successor is not appointed by the Company and
approved by Texas Commerce Bank within a specified period of time. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."     
 
  NEW PRODUCTS; ENGINEERING TESTING DELAYS. The Company's ability to achieve
and maintain a significant market share may depend heavily on its ability to
improve its existing products, as well as to introduce new and innovative
products that facilitate increased use and more specialized applications of
existing products. DTM cannot predict with any certainty the degree to which
its ongoing research and development efforts in the areas of SLS System and
materials enhancements will be successful or, if so, when. In addition, the
Company can provide no assurance of its future success in selecting,
developing, manufacturing and marketing new products. When the Company or its
competitors announce new products with capabilities or technologies that have
the potential to replace the Company's existing product offerings, customers
may defer or forego purchases of existing Company products. This could
materially adversely affect the Company's business and financial performance.
While the Company performs extensive testing prior to releasing new product
designs or product enhancements, products may contain unforeseen errors or
performance problems. The correction of errors and problems in new products
could cause delays in product introductions or shipments, require design
modifications to previously shipped products or cause adverse publicity, any
of which could adversely affect the Company's business and financial
performance.
          
  DEPENDENCE ON KEY PERSONNEL. The Company's success depends to a substantial
extent on certain key employees, particularly John S. Murchison, III, its
President and Chief Executive Officer. Losing the services of one or more key
employees could have a material adverse effect on the Company's business and
financial performance. The Company's success also depends on its ability to
continue to attract highly talented technical personnel. Candidates with
appropriate training and expertise may be in short supply in the geographic
areas where the Company is attempting to recruit personnel. While the Company
has put in place incentive compensation plans intended to provide motivation
for continued employment of key employees, none of the employees is a party to
an employment or noncompetition agreement with the Company and the Company can
give no assurance that it will retain these employees or continue to attract,
assimilate and retain other skilled personnel. See "Management."     
   
  COMPETITION. The market for rapid prototyping systems is highly competitive.
In marketing its SLS Systems, the Company experiences competition from many
sources. Certain of the Company's competitors may be better known and may have
greater financial, research and development, production and marketing
resources than DTM. Competition could increase as a result of the introduction
of new products or product enhancements by these competitors or the entry into
the industry by other companies. Increased competition could result in price
reductions, reduced margins and loss of market share, all of which could
materially adversely affect the Company's business and financial results. See
"Business--Competition."     
   
  EMERGING RAPID PROTOTYPING MARKET. The market for rapid prototyping products
and services is in an early stage of development and includes multiple,
competing technologies, many of which are not yet fully developed.
Participants in this market are moving to address new applications, many of
which may not yet be known or accepted by potential users. Significant
education of the end user in both CAD modeling and rapid prototyping in
general may be a prerequisite to product acceptance. It is not clear at this
time which one or more technologies will gain broad market acceptance. There
can be no assurance that DTM will emerge as a market leader, or even a major
market participant, as the market matures.     
       
  DEPENDENCE ON THIRD-PARTY SUPPLIERS. The Company subcontracts for
manufacture of SLS System components, powdered sintering materials and
accessories from single-source, third-party suppliers. A disruption in supply
or failure of a supplier to remain competitive in functionality or price could
have a material adverse effect on the Company's sales or reputation for timely
delivery, and, hence, on the Company's business and financial performance. See
"Business--Manufacturing."
 
 
                                       8
<PAGE>
 
   
  INTERNATIONAL OPERATIONS. For 1995 and 1996, 33.5% and 50.0%, respectively,
of the Company's revenues were derived from sales of its products and services
in geographical areas outside of the United States. The Company expects that
sales to customers in countries outside of the United States will continue to
make up a significant percentage of total sales. Fluctuations in exchange
rates as well as interest rates could significantly affect DTM's sales in
foreign markets. In particular, a strengthening dollar may adversely affect
the price competitiveness or revenues realized on DTM's sales of products and
services. In addition, exchange rates could adversely affect the value of
receivables arising from foreign sales. The Company does not currently engage
in any hedging to limit the currency exchange risk related to these sales. The
regulatory environment, including import/export laws and protective trade
policies of foreign governments, also could materially adversely affect the
Company's business and financial performance. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations."     
   
  CONTROL OF THE COMPANY. Following the completion of the Offering, prior to
the exercise of any of the options that will be outstanding in connection with
the closing of the Offering under the DTM Corporation Equity Appreciation Plan
and prior to the exercise of the over-allotment option, BFGoodrich will own
approximately 60 percent of the outstanding Common Stock. Accordingly,
BFGoodrich will be able to elect a majority of the Company's board of
directors (the "Board of Directors") and could determine the outcome of
matters submitted to the Company's shareholders for their vote or consent. In
addition, BFGoodrich has indicated that its interest in DTM is primarily
financial and that, if market conditions are favorable, it may divest its
interest in the Company over a period of time, most probably in future
registered offerings of the Common Stock, but possibly also in one or more
private transactions. The Company cannot predict the effect of a private sale
of a controlling interest in the Company, although, depending on the identity
of the purchaser and its reason for acquiring control of the Company, minority
shareholders could be adversely affected.     
   
  LOSS OF TAX ALLOCATION AGREEMENT AND OTHER BENEFITS FROM BFGOODRICH. As a
result of the Offering described herein, the ownership of outstanding Common
Stock by BFGoodrich will decrease to less than 80 percent. Effective as of the
date that such decrease occurs, BFGoodrich will no longer be able to include
DTM's income or loss in BFGoodrich's consolidated federal income tax return;
consequently, DTM will lose the benefit of the tax allocation agreement
between DTM and BFGoodrich. Under that agreement, BFGoodrich credits to the
Company the amount of any benefits realized by BFGoodrich as a result of the
inclusion of DTM's losses and/or tax credits in BFGoodrich's consolidated
federal income tax return. Without the tax benefit allocated from BFGoodrich,
the Company's net loss for 1996 would have increased from approximately $4.5
million to approximately $6.2 million. To the extent the Company incurs future
losses after the tax allocation agreement is no longer in effect, the
application of the resulting tax loss carryforwards would be deferred until
sufficient income is generated to utilize the carryforwards.     
   
  In addition, BFGoodrich currently provides DTM tax administration services,
participation in a group program for various types of insurance and certain
other assistance, including legal services. These arrangements are provided
either at no cost to the Company or on terms that could be considered more
favorable to the Company than those that would be available to DTM in arms-
length transactions with unrelated vendors, principally because DTM is able to
take advantage of cost efficiencies experienced by BFGoodrich due to the size
of its operations. The Company expects that it will continue to participate in
many of these arrangements after the Offering, until such time as BFGoodrich
no longer owns a significant interest in the Company. However, DTM may be
ineligible to take part in some insurance programs and certain other
arrangements once BFGoodrich no longer owns a majority of the outstanding
Common Stock. Either party has the option to terminate any of such
arrangements at any time. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations" and "Certain Transactions--
Certain Arrangements with BFGoodrich."     
 
  POSSIBLE ISSUANCE OF PREFERRED STOCK. The Company's Articles of
Incorporation authorize the issuance of up to 3,000,000 shares of preferred
stock, $.001 par value (the "Preferred Stock"), the terms of which would be
determined by the Board of Directors at the time of issuance, without further
shareholder approval. The Board of Directors would determine whether these
shares would carry voting rights, preferences in the payment of dividends,
sinking fund provisions and liquidation, redemption or conversion rights, if
any. The Company has no current plans to issue Preferred Stock. However, if
such stock is issued in the future, the rights of the holders of Common Stock
could be materially adversely affected. It is possible that the Board of
Directors could grant
 
                                       9
<PAGE>
 
future holders of Preferred Stock rights that could restrict the Company's
ability to merge or sell its assets to a third party, resulting in
preservation of the control of the Company by its then current owners. The
Preferred Stock provisions of the Company's Articles of Incorporation could
inhibit a third party from acquiring a significant amount of the Common Stock,
thereby delaying or preventing changes of the management or control of the
Company, and possibly materially adversely affecting the Common Stock price as
a result. See "Description of Capital Stock."
   
  SHARES ELIGIBLE FOR FUTURE SALE. As of February 15, 1997, shareholders held
a total of 4,331,247 shares of Common Stock, including 3,965,746 shares of
Common Stock held by BFGoodrich. All holders of outstanding shares of Common
Stock have signed agreements ("lock-up agreements") under which they have
agreed not to sell any shares of Common Stock (other than shares offered
pursuant to this Prospectus) for a period of 180 days from the date of this
Prospectus without the prior written consent of the Representatives of the
Underwriters. After expiration of the lock-up agreements, shares of Common
Stock may become eligible for sale in the public market, subject to the volume
limitations under Rule 144 of the Securities Act of 1933, as amended (the
"Securities Act"). Of the holders of Common Stock, only affiliates of the
Company will be affected by the volume limitations of Rule 144. Furthermore,
BFGoodrich will have rights to require the Company to register sales of its
shares of Common Stock under the Securities Act in certain circumstances.     
   
  In connection with the closing of the Offering, DTM employees will hold
immediately exercisable options to purchase an estimated 662,486 shares of
Common Stock under the Equity Appreciation Plan, of which 538,146 shares will
be at prices substantially less than the assumed Offering price of $12.00 per
share. See "Management--Equity Appreciation Plan." The sale of shares of
Common Stock issued upon exercise of stock options outstanding under the
Equity Appreciation Plan will not be restricted other than by the registration
requirements of the federal securities laws. The Company intends to register
the issuance and the sale of the shares of Common Stock issuable on exercise
of options under the Equity Appreciation Plan on a Form S-8 Registration
Statement concurrently with the Offering described herein. As a result, the
Common Stock acquired by employees of DTM upon exercise of options outstanding
under the Equity Appreciation Plan will be freely tradeable. However, all
employees of the Company have signed lock-up agreements under which they have
agreed not to sell any shares of Common Stock, including shares issuable upon
the exercise of options under the Equity Appreciation Plan, for a period of
180 days from the date of this Prospectus, without the prior written consent
of the Representatives of the Underwriters.     
 
  Sales of shares of Common Stock into the market by current shareholders or
employees exercising options could cause a decline in the price of such stock.
See "Management," "Shares Eligible for Future Sale" and "Underwriting."
   
  LACK OF PRIOR PUBLIC MARKETS; VOLATILITY. Prior to the Offering, the Common
Stock was held by a small number of investors and was not traded on any public
market. There can be no assurance of active trading in the Common Stock after
the Offering is completed. The Offering price of the Common Stock was
determined by negotiations among the Company and the Underwriters and may not
be indicative of the market price for shares of the Common Stock after the
Offering. See "Underwriting." The Company has applied for quotation of the
Common Stock on the Nasdaq National Market. Historically, the stock market has
experienced volatility that has particularly affected the market price of
common stock of technology-related companies. That volatility sometimes has
been unrelated to the operating performance of such companies.     
   
  DILUTION. Purchasers of shares of Common Stock offered hereby will suffer
immediate and substantial dilution of $9.75 per share after the Offering and
the issuance of the EAP shares. See "Dilution."     
 
                                      10
<PAGE>
 
                                  THE COMPANY
   
  DTM Corporation was incorporated in Texas in 1987 for the purpose of
licensing and commercializing the selective laser sintering technology
developed and patented by The University of Texas. DTM has acquired an
exclusive worldwide license to the selective laser sintering technology from
The University of Texas, which includes the original patents, plus a right of
first refusal to all improvements thereon. The Company has nine shareholders,
including BFGoodrich, which owns approximately 92 percent of the outstanding
Common Stock, DTM Holdings, Ltd. and The University of Texas. See "Principal
and Selling Shareholders."     
   
  In 1992, the Company began commercial sales of the Sinterstation System.
Prior to that time, the Company's revenues were generated solely from
operating a service bureau in Austin, Texas. Materials that have been
introduced for use in the Company's SLS Systems include: a polycarbonate
powder; two nylon powders; ProtoForm powder, a composite nylon powder;
RapidSteel powder, a metal powder used for the production of prototype mold
inserts; TrueForm powder, a polymer-based material that the Company believes
will be extensively used to produce patterns for soft tooling and investment
casting; and SandForm powder, a sand powder used for the production of sand
molds and cores. The Company recently announced the expected availability of
two new powders: Somos 201 powder, a new material supplied by DuPont that
yields highly flexible parts with rubber-like characteristics, and VeriForm
powder, a significantly improved material for functional prototypes.     
 
  The Company's executive offices are located at 1611 Headway Circle, Building
2, Austin, Texas 78754-5199, and its telephone number is (512) 339-2922.
 
                                USE OF PROCEEDS
   
  The net proceeds to be received by the Company from the sale of the Common
Stock offered hereby are estimated to be approximately $25.1 million, assuming
an Offering price of $12.00 per share. Of the net proceeds to the Company,
$11.0 million will be used to repay the Company's bank debt, $4.0 million will
be used to repay borrowings from BFGoodrich and $0.8 million will be used to
repay other short-term borrowings. The Company intends to use the remaining
net proceeds of approximately $9.3 million for general corporate purposes,
including the funding of working capital requirements. The weighted average
interest rate on the debt to be retired with the proceeds of the Offering as
of December 31, 1996 was 6.2 percent per annum for the bank debt, 8.5 percent
per annum for the borrowings from BFGoodrich and 21.1 percent per annum for
the short-term borrowings. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations--Liquidity and Capital
Resources" and "Certain Transactions--Outstanding Lines of Credit; Financing
Transactions." Pending their use as set forth above, the net proceeds to the
Company from the Offering will be invested in deposits with banks, investment
grade securities and short-term income-producing investments, including
government obligations and other money market instruments.     
       
                                DIVIDEND POLICY
   
  The Company has never paid any dividends on the Common Stock and does not
anticipate that it will pay dividends in the foreseeable future. The Company
intends to reinvest any earnings in the development and expansion of its
business. Any future determinations to pay cash dividends will be at the
discretion of the Board of Directors and will depend upon the Company's
earnings, capital requirements, financial condition, credit and loan covenants
at that time, as well as any other factors deemed relevant by the Board of
Directors. Furthermore, the Company expects that it will be subject to
restrictions on paying dividends pursuant to the terms of a line of credit
that it expects to establish pursuant to a commitment letter from Texas
Commerce Bank. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations--Liquidity and Capital Resources."     
 
                                      11
<PAGE>
 
                                CAPITALIZATION
   
  The following table sets forth the capitalization of the Company and its
consolidated subsidiary at December 31, 1996: (i) on an actual basis; (ii) on
an as adjusted basis to reflect the estimated accounting impact of the
conversion, in connection with the Offering, of all phantom stock appreciation
rights ("SARs") outstanding under the Equity Appreciation Plan into
immediately exercisable options to acquire shares of Common Stock ("EAP
Options"); and (iii) on an as adjusted basis to reflect item (ii) and the sale
of 2,300,248 shares of Common Stock by the Company (at an assumed Offering
price of $12.00 per share and after deducting estimated underwriting discount
and Offering expenses, totaling $2,500,000) and the application of the
estimated net proceeds therefrom.     
 
<TABLE>   
<CAPTION>
                                             DECEMBER 31, 1996
                            ----------------------------------------------------
                                                     AS ADJUSTED
                                      ------------------------------------------
                                                            FOR THE OFFERING AND
                                                             CONVERSION OF THE
                                      FOR CONVERSION OF THE      SARS INTO
                             ACTUAL   SARS INTO EAP OPTIONS     EAP OPTIONS
                            --------  --------------------- --------------------
                                          (DOLLARS IN THOUSANDS)
<S>                         <C>       <C>                   <C>
SHORT-TERM BORROWINGS.....  $    769        $    769              $    --
                            ========        ========              ========
BORROWINGS UNDER LINE OF
 CREDIT FROM BFGOODRICH...  $  4,000        $  4,000              $    --
                            ========        ========              ========
NOTES PAYABLE TO BANKS....  $ 11,040        $ 11,040              $    --
                            ========        ========              ========
SHAREHOLDERS' EQUITY (DEF-
 ICIT):
  Preferred Stock, $.001
   par value:
   3,000,000 shares
   authorized, no shares
   issued and
   outstanding............  $    --         $    --               $    --
  Common Stock, $.0002 par
   value:
   60,000,000 shares
   authorized; 4,331,247
   actual shares issued
   and outstanding;
   6,631,495 shares issued
   and outstanding as
   adjusted for the
   Offering(1)............         1               1                     1
  Additional paid-in capi-
   tal(2).................    28,019          33,341                58,444
  Accumulated deficit(2)..   (36,469)        (41,791)              (41,791)
  Cumulative translation
   adjustment.............       (36)            (36)                  (36)
                            --------        --------              --------
Total shareholders' equity
 (deficit)................  $ (8,485)       $ (8,485)             $ 16,618
                            ========        ========              ========
</TABLE>    
- --------
       
       
   
(1) Includes the sale of 2,300,248 shares in the Offering and excludes an
    estimated 662,486 shares of Common Stock that will be issuable upon
    exercise of EAP Options. See "Management--Equity Appreciation Plan" and
    "Underwriting."     
   
(2) As Adjusted gives effect to the issuance of an estimated 538,146 shares of
    Common Stock issuable to employees upon the exercise of EAP Options,
    certain of which will have exercise prices substantially less than the
    assumed Offering price of $12.00 per share, that will be outstanding in
    connection with the closing of the Offering under the DTM Corporation
    Equity Appreciation Plan. See "Management--Equity Appreciation Plan" and
    "Management's Discussion and Analysis of Financial Condition and Results
    of Operations."     
 
                                      12
<PAGE>
 
                                   DILUTION
   
  As of December 31, 1996, the Company had a net tangible book value (deficit)
of $(10,123,462), or $(2.34) per outstanding share of Common Stock. Net
tangible book value (deficit) represents the amount of total tangible assets
less total liabilities. Adjusting such net tangible book value (deficit) per
share to give effect to the sale by the Company of 2,300,248 shares of Common
Stock at an assumed Offering price of $12.00 per share (and deducting from the
assumed proceeds estimated underwriting discount and Offering expenses to be
paid by the Company totaling $2,500,000), the Company's net tangible book
value as adjusted for the Offering at December 31, 1996 would have been
$14,979,514, or $2.26 per share of Common Stock. This constitutes an immediate
increase in net tangible book value of $4.60 per share to existing
shareholders and immediate dilution of $9.74 per share to new investors
purchasing shares in the Offering.     
   
  After giving further effect to the issuance, for cash consideration of
$1,135,488, of 538,146 shares of Common Stock (the "EAP Shares") estimated to
be issuable upon exercise of certain immediately exercisable EAP Options
having exercise prices substantially less than the assumed Offering price of
$12.00 per share, the net tangible book value per share as adjusted for the
Offering and the issuance of EAP shares would have been $2.25 per share. This
constitutes an immediate additional decrease in net tangible book value of
$(0.01) per share to existing shareholders and new investors and results in a
cumulative immediate dilution of $9.75 per share to new investors purchasing
shares in the Offering.     
 
<TABLE>     
   <S>                                                           <C>     <C>
   Assumed Offering price per share to new investors............         $12.00
                                                                         ======
     Net tangible book value (deficit) per share as of December
      31, 1996.................................................. $(2.34)
     Increase per share attributable to new investors...........   4.60
                                                                 ------
     Net tangible book value per share as adjusted for the
      Offering..................................................   2.26
   Dilution per share to new investors after the Offering.......         $ 9.74
                                                                         ======
     Adjustment to reflect assumed issuance of EAP Shares.......  (0.01)
                                                                 ------
   Pro forma net tangible book value per share as adjusted for
    the Offering and the assumed issuance of EAP Shares......... $ 2.25
                                                                 ======
   Dilution per share to new investors after the Offering and
    the assumed issuance of the EAP Shares......................         $ 9.75
                                                                         ======
</TABLE>    
   
  The following table summarizes, on a pro forma basis as of December 31,
1996, the differences in the total consideration and the average price per
share of Common Stock paid or contributed by existing shareholders and to be
paid by purchasers of Common Stock from the Company in the Offering at an
assumed Offering price of $12.00 per share. For purposes of the table, the EAP
Shares are assumed to have been issued on December 31, 1996.     
 
<TABLE>   
<CAPTION>
                                SHARES PURCHASED  TOTAL CONSIDERATION  AVERAGE
                                ----------------- -------------------   PRICE
                                 NUMBER   PERCENT   AMOUNT    PERCENT PER SHARE
                                --------- ------- ----------- ------- ---------
<S>                             <C>       <C>     <C>         <C>     <C>
Existing shareholders(1)(2).... 4,331,247   60.4% $28,020,033   49.4%  $ 6.47
                                                                       ======
EAP shareholders(3)............   538,146    7.5    1,135,488    2.0   $ 2.11
                                ---------  -----  -----------  -----   ======
                                4,869,393   67.9   29,155,521   51.4   $ 5.99
                                                                       ======
New investors(2)(4)............ 2,300,248   32.1   27,602,976   48.6   $12.00
                                ---------  -----  -----------  -----   ======
  Total........................ 7,169,641  100.0% $56,758,497  100.0%  $ 7.92
                                =========  =====  ===========  =====   ======
</TABLE>    
- --------
(1) Total consideration for existing shareholders is the Company's recorded
    amounts for Common Stock and additional paid-in capital.
   
(2) Sales by the Selling Shareholders in the Offering will reduce the number
    of shares held by existing shareholders to 4,078,495 shares or 61.5% of
    the total number of shares of Common Stock outstanding after the Offering
    (or 55.9% assuming the exercise of an estimated 662,486 EAP Options), and
    will increase the number of shares held by new investors to 2,553,000 or
    38.5% of the total number of shares of Common Stock outstanding after the
    Offering (or 35.0% assuming the exercise of an estimated 662,486 EAP
    Options). See "Principal and Selling Shareholders."     
   
(3) Gives effect to the issuance of Common Stock issuable to employees upon
    the exercise of certain immediately exercisable EAP Options having
    exercise prices substantially less than the assumed Offering price of
    $12.00 per share.     
   
(4) Total consideration is not reduced by estimated underwriting discounts and
    Offering expenses to be paid by the Company totaling $2,500,000.     
 
                                      13
<PAGE>
 
                     SELECTED CONSOLIDATED FINANCIAL DATA
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
   
  The following selected financial data for the five years ended December 31,
1996 is derived from audited consolidated financial statements of the Company.
The data should be read in conjunction with the consolidated financial
statements, related notes and other financial information included herein.
    
<TABLE>   
<CAPTION>
                                         YEAR ENDED DECEMBER 31,
                              -------------------------------------------------
                                1992      1993      1994      1995      1996
                              --------  --------  --------  --------  ---------
<S>                           <C>       <C>       <C>       <C>       <C>
STATEMENTS OF OPERATIONS
 DATA:
 Revenue:
 Products...................  $  2,841  $  6,989  $  8,127  $ 12,632  $  22,070
 Service and support(1).....     2,027     2,593     1,112     1,579      2,309
                              --------  --------  --------  --------  ---------
  Total revenue.............     4,868     9,582     9,239    14,211     24,379
 Cost of sales:
 Products...................     2,462     5,699     5,370     8,803     13,021
 Service and support........     1,705     2,141       511       873      1,424
                              --------  --------  --------  --------  ---------
  Total cost of sales.......     4,167     7,840     5,881     9,676     14,445
                              --------  --------  --------  --------  ---------
 Gross profit...............       701     1,742     3,358     4,535      9,934
 Operating expenses:
 Selling, general and
  administrative............     4,948     5,588     5,249     6,620      9,980
 Research and development...     5,377     5,798     3,840     3,521      4,292
                              --------  --------  --------  --------  ---------
  Total operating expenses..    10,325    11,386     9,089    10,141     14,272
 Operating loss.............    (9,624)   (9,644)   (5,731)   (5,606)    (4,338)
 Other income (expense):
 Gain on sale of service
  bureau....................       --        238       --        --         --
 Interest expense, net......       (10)     (328)     (178)     (530)    (1,066)
 Cost of discontinued
  registration..............       --        --        --        --        (752)
                              --------  --------  --------  --------  ---------
  Total other income
   (expense)................       (10)      (90)     (178)     (530)    (1,818)
                              --------  --------  --------  --------  ---------
 Loss before income tax
  benefit allocated
  from BFGoodrich...........    (9,634)   (9,734)   (5,909)   (6,136)    (6,156)
 Income tax benefit
  allocated from
  BFGoodrich................     3,032     3,084     1,825     2,138      1,667
                              --------  --------  --------  --------  ---------
 Net loss...................  $ (6,602) $ (6,650) $ (4,084) $ (3,998) $  (4,489)
                              ========  ========  ========  ========  =========
Pro forma(2):
 Net loss...................                                          $  (6,156)
                                                                      =========
 Net loss per share.........                                          $   (1.29)
                                                                      =========
 Number of shares used(3)...                                          4,774,718
                                                                      =========
Pro forma, as adjusted for
 the Offering(2)(4):
 Net loss...................                                          $  (5,069)
                                                                      =========
 Net loss per share.........                                          $   (0.81)
                                                                      =========
 Number of shares used(3)...                                          6,223,336
                                                                      =========
BALANCE SHEET DATA (AT
 PERIOD END):
 Working capital (deficit)..  $ (2,808) $  1,818  $    342  $    236      1,622
 Total assets...............    10,010    12,384     8,560    10,639     17,897
 Total debt.................     4,425     3,000     4,600     9,076     15,809
 Total liabilities..........     6,965     8,306     8,516    14,557     26,382
 Shareholders' equity
  (deficit).................     3,045     4,078        44    (3,918)    (8,485)
</TABLE>    
- --------
   
(1) Includes domestic rapid prototyping service bureau activity through
    December 1993, at which time the Company sold its domestic service bureau.
    Revenues associated with the service bureau operations for the years ended
    December 31, 1992 and 1993 totaled approximately $1.9 million for each
    year.     
(2) Computed on a stand-alone basis, without allocation of income tax benefit
    from BFGoodrich.
   
(3) Gives effect to the issuance of an estimated 538,146 shares of Common
    Stock estimated to be issuable to employees upon the exercise of
    immediately exercisable EAP Options, certain of which will have exercise
    prices substantially less than the assumed Offering price of $12.00 per
    share. See "Management's Discussion and Analysis of Financial Condition
    and Results of Operations" and "Management--Equity Appreciation Plan."
           
(4) Gives effect to (i) that number of offered shares the net proceeds from
    which are necessary to fund debt repayments (assuming such shares are sold
    at an Offering price of $12.00 per share) as described in "Use of
    Proceeds" and (ii) the elimination of historically incurred interest
    expense of $1,087 related to such debt.     
 
                                      14
<PAGE>
 
                    
                 MANAGEMENT'S DISCUSSION AND ANALYSIS OF     
                 
              FINANCIAL CONDITION AND RESULTS OF OPERATIONS     
   
  The following discussion and analysis should be read in conjunction with the
Company's Consolidated Financial Statements and the Notes thereto appearing
elsewhere in this Prospectus.     
   
OVERVIEW     
   
  DTM Corporation develops, designs, manufactures, markets and supports, on an
international basis, rapid prototyping and rapid tooling systems, powdered
materials and related services. The Company's SLS Systems and materials are
based on proprietary and patented selective laser sintering technology. The
Company was incorporated in 1987, and prior to shipment of its first SLS
System in 1992, it derived revenues solely from a service bureau it operated
in Austin, Texas.     
   
  Revenues are generated by product sales and service and support activities.
Product revenues include sales of SLS Systems, related powdered materials and,
beginning in 1995, upgrades and rentals of SLS Systems. Service and support
activities include maintenance, warranty service, customer training and,
through 1993, the operation of a service bureau. When an SLS System is sold,
between 94 and 97 percent of the sales price is immediately recognized as
product revenue, with the remainder deferred and recognized ratably over the
System's 12-month warranty period as service and support revenue. Revenue
related to annual maintenance contracts is also deferred and recognized
ratably over the support period.     
   
  Over the past three years, an element of the Company's business strategy has
been to increase its recurring sources of revenue, primarily through sales of
materials, maintenance services, SLS System upgrades and other supporting
products and accessories to users of SLS Systems. The Company expects to
continue this strategy. In 1996, sales of materials, spare parts, services and
upgrades represented approximately 33 percent of total revenues. The Company
anticipates that materials sales, in particular, will continue to represent a
significant portion of future revenues as its installed base of SLS Systems
increases.     
   
  As more fully described herein, the Company has historically experienced
significant fluctuations in its gross margins. Such fluctuations were impacted
by, among other factors, the trade-in of pre-commercial SLS Systems for
commercial SLS Systems, the resale of such pre-commercial SLS Systems and two
sales of internally utilized SLS Systems with substantially depreciated net
book value. Specifically, in 1994, the Company's gross margin was positively
impacted by the sale of two SLS Systems that were carried at no cost. The
Company's gross margins improved during 1996, as the average SLS System price
has increased, in part, due to the introduction of several new powders and the
introduction of the new Sinterstation 2500 System. Gross margin for the year
ended December 31, 1996 increased to 40.7% from 31.9% in 1995 and for the
three months ended December 31, 1996, gross margin increased to 41.1% from
38.0% for the same period in 1995.     
   
  The Company's operating results have varied substantially from year to year
and quarter to quarter. A sale by the Company of one of its SLS Systems can be
material to the operating results for any one quarter. Furthermore, new
product introductions, seasonality of customer buying patterns and other
factors can cause fluctuations in operating results.     
 
                                      15
<PAGE>
 
          
RESULTS OF OPERATIONS     
   
  The following table sets forth for the periods indicated certain income
statement data as a percentage of total revenues and certain cost of sales
data as a percentage of respective product revenues and service and support
revenues.     
 
<TABLE>   
<CAPTION>
                                                 YEAR ENDED DECEMBER 31,
                                                 ---------------------------
                                                  1994      1995      1996
                                                 -------   -------   -------
<S>                                              <C>       <C>       <C>
Revenue:
  Products......................................    88.0 %    88.9 %    90.5 %
  Service and support...........................    12.0      11.1       9.5
                                                 -------   -------   -------
    Total revenues..............................   100.0     100.0     100.0
Cost of sales:
  Products......................................    66.1      69.7      59.0
  Service and support...........................    46.0      55.3      61.7
                                                 -------   -------   -------
    Total cost of sales.........................    63.7      68.1      59.3
                                                 -------   -------   -------
Gross profit....................................    36.3      31.9      40.7
Operating expenses:
  Selling, general and administrative...........    56.8      46.6      40.9
  Research and development......................    41.6      24.8      17.6
                                                 -------   -------   -------
    Total operating expenses....................    98.4      71.4      58.5
Other income (expense):
  Interest expense, net.........................    (1.9)     (3.7)     (4.4)
  Cost of discontinued registration.............     --        --       (3.1)
                                                 -------   -------   -------
    Total other income (expense)................    (1.9)     (3.7)     (7.5)
Loss before income tax benefit allocated from
 BFGoodrich.....................................   (64.0)    (43.2)    (25.3)
Income tax benefit allocated from BFGoodrich....    19.8      15.1       6.9
                                                 -------   -------   -------
Net loss........................................   (44.2)%   (28.1)%   (18.4)%
                                                 =======   =======   =======
</TABLE>    
   
 Comparison of Years Ended December 31, 1996 and December 31, 1995     
   
  Revenues. Revenues for 1996 were $24.4 million, an increase of 71.6 percent,
or $10.2 million, compared to revenues of $14.2 million for 1995.     
   
  Product sales revenue for 1996 was $22.1 million, an increase of 74.7
percent, or $9.4 million, compared to product sales revenue of $12.6 million
for 1995. The increase was primarily attributable to greater sales of SLS
Systems and powdered materials. The number of SLS Systems sold or rented
increased to 51 in 1996 from 36 in 1995. Revenues from powdered materials
sales increased as a result of a larger number of installed SLS Systems along
with increased sales of ProtoForm powder and the introduction of TrueForm,
RapidSteel and SandForm powdered materials during 1996.     
   
  Service and support revenue for 1996 was $2.3 million, an increase of 46.2
percent, or $730,000, compared to service and support revenue of $1.6 million
for 1995. Service and support revenue increased primarily as a result of the
recognition of deferred warranty and maintenance revenue associated with the
larger number of installed SLS Systems.     
   
  Gross Profit. Gross profit for 1996 was $9.9 million, an increase of 119.1
percent, or $5.4 million, compared to gross profit of $4.5 million for 1995.
As a percentage of revenue, gross profit increased to 40.7 percent during the
period from 31.9 percent in 1995.     
 
                                      16
<PAGE>
 
   
  Gross profit attributable to product sales for 1996 was $9.0 million, an
increase of 136.3 percent, or $5.2 million, compared to gross profit
attributable to product sales of $3.8 million for 1995. As a percentage of
product sales revenue, gross profit attributable to product sales increased to
41.0 percent during the period, compared to 30.3 percent for the same period
in 1995. The increase in gross profit attributable to product sales as a
percentage of product sales revenue resulted primarily from an increase in the
average SLS System sales price due in part to the introduction of the higher
priced Sinterstation 2500 System. Gross profit margin was also positively
impacted during 1996 by the sale of two SLS Systems in the first quarter that
had been used in the Company's operations and were carried on the Company's
books at a substantially depreciated value.     
   
  Gross profit attributable to service and support revenues for 1996 was
$885,000, an increase of 25.4 percent, or $179,000, compared to gross profit
attributable to service and support revenues of $706,000 for 1995. As a
percentage of service and support revenue, gross profit attributable to
service and support revenues was 38.3 percent and 44.7 percent for 1996 and
1995, respectively.     
   
  Selling, General and Administrative Expense. Selling, general and
administrative expense for 1996 was $10.0 million, an increase of 50.8
percent, or $3.4 million, compared to selling, general and administrative
expense of $6.6 million for 1995. As a percentage of revenue, selling, general
and administrative expense decreased to 40.9 percent in 1996 from 46.6 percent
in 1995, primarily due to the effect of fixed costs being spread over a larger
base of revenues. Selling, general and administrative expenses in 1996 were
adversely impacted by $250,000 of severance costs and $268,000 of bad debts
incurred in the fourth quarter.     
   
  Research and Development Expense. Research and development expense for 1996
was $4.3 million, an increase of 21.9 percent, or $771,000, compared to
research and development expense of $3.5 million for 1995. As a percentage of
revenue, research and development expense decreased to 17.6 percent for 1996
from 24.8 percent for 1995, primarily due to the increase in revenues.     
   
  Interest Expense. Net interest expense for 1996 was $1.1 million, an
increase of $536,000 compared to interest expense of $530,000 for 1995. This
reflects an increase in the average daily balance of the Company's outstanding
indebtedness and an increase in the average interest rates on such debt.     
   
  Cost of Discontinued Registration. In the fourth quarter of 1996, the
Company expensed $752,000 of legal, accounting and other professional services
related to a previous initial public offering that was postponed.     
   
  Income Taxes. As a result of its tax sharing arrangement with BFGoodrich,
the Company was allocated an income tax benefit of $1.7 million in 1996
compared to $2.1 million in 1995.     
   
 Comparison of Years Ended December 31, 1995 and December 31, 1994     
   
  Revenues. Revenues for 1995 were $14.2 million, an increase of 53.8 percent,
or $5.0 million, compared to revenues of $9.2 million for 1994.     
   
  Product sales revenue for 1995 was $12.6 million, an increase of 55.4
percent, or $4.5 million, compared to product sales revenue of $8.1 million
for 1994. The increase was primarily attributable to higher SLS Systems and
powdered materials sales. The number of SLS Systems shipped increased to 36 in
1995 (including two rental SLS Systems) from 23 in 1994. In 1995 the Company
began offering technological enhancements as upgrades to its SLS Systems and
experienced increased revenues from powdered material sales as a result of a
larger number of SLS System users purchasing DTM materials and the
introduction of the Company's new ProtoForm powdered material in March 1995.
       
  Service and support revenue for 1995 was $1.6 million, an increase of 42.0
percent, or $467,000, compared to service and support revenue of $1.1 million
for 1994. Service and support revenue increased primarily as a result of the
recognition of deferred warranty and maintenance revenues associated with the
larger number of installed SLS Systems.     
       
                                      17
<PAGE>
 
   
  Gross Profit. Gross profit for 1995 was $4.5 million, an increase of 35.1
percent, or $1.1 million, compared to gross profit of $3.4 million for 1994.
As a percentage of revenue, gross profit decreased to 31.9 percent in 1995
from 36.3 percent in 1994.     
   
  Gross profit attributable to product sales for 1995 was $3.8 million, an
increase of 38.9 percent, or $1.0 million, compared to gross profit
attributable to product sales of $2.8 million for 1994. As a percentage of
product sales revenue, gross profit decreased to 30.3 percent in 1995 from
33.9 percent in 1994. The decrease in gross profit as a percentage of product
sales revenue in 1995 resulted primarily from a lower average sales price of
the Company's SLS Systems and because in 1994, the Company's gross profit was
positively impacted by the sale of two SLS Systems that were carried at no
cost. These two SLS Systems were pre-production or "beta" units that had been
sold to customers under a special testing program in 1992 in which such
customers undertook to provide testing results to DTM. Upon providing
commercial SLS Systems to the customers involved in the testing program, the
pre-production units were returned to DTM and carried at no value because the
Company, at that time, did not intend to offer such units for resale.     
   
  Gross profit attributable to service and support revenues for 1995 was
$706,000, an increase of 17.5 percent, or $105,000, compared to gross profit
attributable to service and support revenues of $601,000 for 1994. As a
percentage of service and support revenue, gross profit decreased to 44.7
percent in 1995 from 54.0 percent in 1994. The decrease in gross profit as a
percentage of service and support revenue resulted from a greater number of
field service employees and related costs required to service a larger, more
geographically diverse installed base.     
   
  Selling, General and Administrative Expense. Selling, general and
administrative expense for 1995 was $6.6 million, an increase of 26.1 percent,
or $1.4 million, compared to selling, general and administrative expense of
$5.2 million for 1994. As a percentage of revenue, selling, general and
administrative expense decreased to 46.6 percent in 1995 from 56.8 percent in
1994, primarily due to the increase in revenues. A larger workforce in 1995
resulted in compensation and fringe benefits increasing more than $780,000
over 1994 costs. In addition, agent commissions and advertising and promotion
costs increased by approximately $620,000 over the prior year.     
   
  Research and Development Expense. Research and development expense for 1995
was $3.5 million, a decrease of 8.3 percent, or $319,000, compared to research
and development expense of $3.8 million for 1994. As a percentage of revenue,
research and development expense decreased to 24.8 percent in 1995 from
41.6 percent in 1994, primarily due to the increase in revenues.     
   
  Interest Expense. Net interest expense for 1995 was $530,000, an increase of
$352,000 compared to interest expense of $178,000 for 1994. This reflects an
increase in the average daily balance of the Company's outstanding
indebtedness and an increase in the average interest rates on such debt.     
   
  Income Taxes. As a result of its tax sharing arrangement with BFGoodrich,
the Company was allocated an income tax benefit of $2,138,000 in 1995 compared
to $1,825,000 in 1994.     
 
                                      18
<PAGE>
 
   
SELECTED QUARTERLY RESULTS     
   
  The following table sets forth certain unaudited quarterly results of
operations for the three-month periods ended March 31, 1995 through December
31, 1996. This information has been presented on substantially the same basis
as the audited consolidated financial statements appearing elsewhere herein.
The unaudited quarterly results of operations should be read in conjunction
with the Company's audited consolidated financial statements and related
notes. The quarterly financial information presented herein should not be
relied upon as an indication of future quarterly performance.     
 
<TABLE>   
<CAPTION>
                                                               THREE MONTHS ENDED
                       ---------------------------------------------------------------------------------------------------
                       MARCH 31,  JUNE 30,  SEPTEMBER 30,  DECEMBER 31,  MARCH 31,  JUNE 30,  SEPTEMBER 30,  DECEMBER 31,
                          1995      1995         1995          1995         1996      1996         1996         1996(1)
                       ---------- --------- -------------- ------------- ---------- --------- -------------- -------------
                                                             (DOLLARS IN THOUSANDS)
<S>                    <C>        <C>       <C>            <C>           <C>        <C>       <C>            <C>
SLS Systems sold or
 rented..............         6          9          10            11           13         12           6            20
Revenues:
 Product.............   $ 1,749    $ 2,903     $ 3,036        $4,944       $5,329    $ 5,049     $ 3,040        $8,652
 Service and
  support............       264        291         452           572          461        507         736           605
                        -------    -------     -------        ------       ------    -------     -------        ------
 Total...............     2,013      3,194       3,488         5,516        5,790      5,556       3,776         9,257
Cost of sales:
 Product.............     1,275      2,173       2,179         3,176        3,169      3,022       1,757         5,073
 Service and
  support............       160        170         300           243          300        320         428           376
                        -------    -------     -------        ------       ------    -------     -------        ------
 Total...............     1,435      2,343       2,479         3,419        3,469      3,342       2,185         5,449
                        -------    -------     -------        ------       ------    -------     -------        ------
Gross profit.........       578        851       1,009         2,097        2,321      2,214       1,591         3,808
Operating expenses...     2,304      2,437       2,475         2,925        2,990      3,219       3,724         4,339
                        -------    -------     -------        ------       ------    -------     -------        ------
Operating loss.......   $(1,726)   $(1,586)    $(1,466)       $ (828)      $ (669)   $(1,005)    $(2,133)       $ (531)
                        =======    =======     =======        ======       ======    =======     =======        ======
</TABLE>    
- --------
   
(1) Operating expenses for the three months ended December 31, 1996 include
    unusual expenses of $250 for severance costs and $268 of bad debt expense.
    Excluding these items, operating loss for the period would have been $13.
           
SEASONALITY     
   
  The Company's revenues are affected by capital budgeting and spending
patterns in the North American market and shortened selling periods in certain
international markets. Due to these seasonal factors, the Company typically
experiences slowdowns in sales of SLS Systems during the first quarter as the
result of capital spending patterns in the North American market and during
the third quarter as the result of shortened selling periods in certain
international markets.     
   
FOREIGN OPERATIONS     
   
  The Company competes on an international basis through its wholly owned
subsidiary located in Germany and through export sales derived from its United
States sales operations (principally to the Pacific Rim). Sales to customers
outside of the United States constitute a significant portion of DTM's
revenues. International sales accounted for 34.8 percent, 33.5 percent and
50.0 percent of the Company's total net revenues in 1994, 1995 and 1996,
respectively.     
   
  International sales are generally priced in U.S. dollars. However, European
sales prices are sometimes negotiated in either Deutsch Marks or the local
currency. The Company does not engage in hedging to mitigate the effects of
foreign currency exchange rate risk and has not experienced any significant
impact therefrom.     
       
                                      19
<PAGE>
 
   
EQUITY APPRECIATION PLAN     
   
  The Company adopted a phantom stock appreciation rights plan whereby all
phantom stock appreciation rights outstanding upon the Offering will be
converted into immediately exercisable options to acquire shares of the
Company's Common Stock. Such conversion will result in a non-recurring, non-
cash, compensation expense, in the quarter in which it becomes probable that
the closing of the Offering will occur. The amount to be recognized as
compensation expense, with respect to SARs granted during 1995 (which comprise
approximately 81.2% of the total number of SARs granted), will be equal to
approximately $5.3 million (assuming an Offering price of $12.00 per share) to
record the appreciation in value of the SARs, resulting in a substantial
reported net loss. See "Management--Equity Appreciation Plan" and "Note 11--
Equity Appreciation Plan" to the Consolidated Financial Statements.     
   
LIQUIDITY AND CAPITAL RESOURCES     
   
  Since its inception, cash used by the Company for operations and investing
activities has exceeded cash generated by the Company. The Company generally
has financed its cash needs through transactions with BFGoodrich and
borrowings from commercial banks and other short-term sources.     
   
  Net cash used in operating activities was approximately $1.8 million, $1.6
million and $4.1 million in 1994, 1995 and 1996, respectively. Net cash used
in operating activities of $4.1 million for 1996 resulted primarily from the
net loss for the year of $4.5 million adjusted for depreciation and
amortization of $2.2 million. In addition, increases in accounts receivable of
$4.3 million and increases in inventory of $2.7 million were offset by an
increase to accounts payable of $3.3 million. For the three years ended
December 31, 1994, 1995 and 1996, BFGoodrich allocated to the Company
approximately $1.8 million, $2.1 million, $1.7 million, respectively, for tax
benefits resulting from inclusion of the Company in the consolidated income
tax return of BFGoodrich. Such amounts are included in "Due to/from
BFGoodrich" in changes in assets and liabilities used in operating activities
in the Consolidated Statements of Cash Flows in the Consolidated Financial
Statements. See Note 9 to the Consolidated Financial Statements.     
   
  The Company's investing activities include expenditures for patents and
licenses, capitalized software costs and furniture and equipment, principally
consisting of the Company's SLS Systems built for internal use and rental
purposes. Net cash used by investing activities was approximately $1.4
million, $2.4 million and $3.0 million in 1994, 1995 and 1996, respectively.
The Company expects that capital expenditures in 1997 will approximate $2.1
million.     
          
  The existence of the tax benefit allocation and other services from
BFGoodrich reduced the Company's net loss for years 1994 through 1996. The
Company expects that the loss of the tax benefit allocation would materially
adversely affect its financial results and cash flows if the Company were to
generate losses in any given year, but does not anticipate any adverse effect
if the Company generates profits. The benefits of utilizing future tax loss
carryforwards would be realized, however, should sufficient profits be
generated prior to the expiration of any tax loss carryforwards. The Company
believes that it is reasonably likely that additional costs will be incurred
as its other arrangements with BFGoodrich are discontinued over time, but does
not believe that these costs will be material.     
   
  Total indebtedness of the Company was approximately $15.8 million as of
December 31, 1996, consisting primarily of notes payable to commercial banks
under existing lines of credit, short-term borrowings from other financing
sources and a line of credit extended to the Company by BFGoodrich under which
the Company may borrow up to $4.0 million. As of December 31, 1996, amounts
outstanding under these facilities were approximately $11.0 million, $769,000,
and $4.0 million respectively, at weighted average interest rates of 6.2
percent, 21.1 percent and 8.5 percent, respectively. In connection with the
Offering, the Company is required to repay all its bank indebtedness and the
amounts outstanding under the line of credit with BFGoodrich. Absent the
Offering, the notes payable to the banks and the line of credit from
BFGoodrich mature on July 31, 1998. Short term borrowings mature upon
collection of the related collateralized receivables or termination of the
    
                                      20
<PAGE>
 
   
related SLS System rental agreement. In the past, BFGoodrich assisted the
Company in obtaining loans from commercial banks by providing comfort letters
to lenders. The Company has been advised by BFGoodrich that upon completion of
the Offering it does not intend to continue to finance, or arrange for the
financing of, the operations of the Company.     
   
  In February 1997, the Company obtained a loan commitment letter from Texas
Commerce Bank for a revolving line of credit ("line of credit") contingent
upon the successful completion of the Offering, retirement of existing bank
and BFGoodrich indebtedness and negotiation and execution of mutually
acceptable definitive documentation. Assuming a line of credit is established
with the terms set forth in the commitment letter, the Company's ability to
borrow thereunder will be subject to a borrowing base calculation and the
Company meeting certain financial thresholds, including attaining certain
levels of "established profitability," as defined therein. Until achieving one
such level, the Company would be permitted to borrow up to $3.0 million;
thereafter, available advances against eligible receivables would be increased
up to a maximum of $6.0 million. Loans under the line of credit would mature
within one year, would be collateralized by the Company's accounts receivable
and inventory and would bear interest at the bank's prime interest rate plus
three quarters of one percent. The commitment provides that the Company would
be bound by customary covenants, including restrictions on additional liens or
borrowings, as well as the payment of dividends, and affirmative reporting
requirements. In addition, the terms of the commitment letter specify that the
bank would have the option to terminate the obligation to make further
advances under the line of credit on 30 days notice if employment of the chief
executive officer of the Company terminates and a qualified successor is not
appointed by the Company and approved by Texas Commerce Bank within a
specified period of time.     
   
  The Company believes that the available cash balances upon completion of the
Offering, after repayment of the amounts identified above and the new bank
line of credit, along with cash from operations, will provide sufficient
liquidity for the Company to meet its anticipated cash requirements for at
least the 12 months following the Offering, however, there can be no assurance
that this will be the case. See "--Safe Harbor Statement."     
   
SAFE HARBOR STATEMENT     
   
  Investors are cautioned that forward-looking statements contained in this
Prospectus involve risks and uncertainties including without limitation the
following: (i) The Company's plans, strategies, objectives, expectations and
intentions are subject to change at any time at the discretion of management
and the Board of Directors; (ii) the Company's plans and results of operations
will be affected by the Company's ability to manage its growth and working
capital; (iii) the Company's business is highly competitive and the entrance
of new competitors or the expansion of the operations by existing competitors
in the Company's markets could adversely affect the Company's plans and
results of operations.     
       
       
       
                                      21
<PAGE>
 
                                   BUSINESS
   
  DTM Corporation develops, designs, manufactures, markets and supports, on an
international basis, rapid prototyping and rapid tooling systems , powdered
materials and related services. The Company's SLS Systems and materials are
based on proprietary and patented selective laser sintering technology. Rapid
prototyping is the creation of a solid three-dimensional model or prototype
directly from CAD data. Rapid tooling is the creation of durable tooling that
can be subsequently employed to produce substantial quantities of parts for
market introduction. Use of the Company's SLS Systems significantly reduces
the time required to produce models and prototypes for testing actual product
fit and form, ergonomic design and functionality from what otherwise could be
months or weeks to days or, in some cases, hours. The Company's SLS Systems
are used to accelerate the design, development and market introduction of
products in a wide range of industries, including but not limited to the
automotive, aerospace, medical, electronics, telecommunications, computer,
appliance, footwear, toy and power tool industries. BFGoodrich currently owns
approximately 92 percent of the outstanding Common Stock. See "Principal and
Selling Shareholders."     
 
INDUSTRY OVERVIEW
 
  Since the 1980s, the field of product engineering, design and development
has undergone rapid change with ever-increasing emphasis on time to market as
a key factor in successful product introduction. The rapid prototyping
industry has arisen as a part of, and in response to, this change. In
addition, utilization and growth in purchases of rapid prototyping systems
have been directly influenced by the availability of CAD installations. During
the early years of the rapid prototyping industry, the limited availability of
CAD outside of North America restricted growth; however, worldwide
installations of CAD have proliferated in recent years, making rapid
prototyping technology a viable alternative to conventional methods.
 
 Development of Rapid Prototyping
   
  Under conventional technology, models, prototypes, patterns and metal mold
inserts are typically created using milling and computer numerically
controlled and electrode machining techniques--cutting and sanding solid
blocks of materials to arrive at the desired shape. Depending on the material
used and the complexity of the part, this process can be time-consuming and
expensive. In some cases, the only way to create an appropriate test model or
prototype using conventional methods is essentially to duplicate the steps
used to create the mass-produced product. The conventional processes can take
weeks, and in some cases months, and often involve costly steps and delays for
a manufacturer seeking to take advantage of a new market opportunity.     
 
  The first rapid prototyping systems were introduced in 1986 in an attempt to
address some of the cost and time to market disadvantages of conventional
technology. These systems were based on stereolithography, a process that uses
a laser to convert liquid resin into a solid part. Because of the nature of
the resin material, these initial systems were only capable of producing parts
for use as concept models that were limited to verification of the design's
form and fit. Successive technologies such as selective laser sintering, along
with advances in stereolithography, have broadened the applications for rapid
prototyping to include functional prototypes and patterns for secondary
processes that enable users to test actual product fit and form, ergonomic
design and functionality.
   
 The Rapid Prototyping Advantage     
   
  The capability of rapid prototyping to manufacture models, prototypes,
patterns and metal tool inserts quickly affords users the opportunity to save
time and money by (i) reducing the product development and design cycle and,
consequently, speeding the time to market for new products, (ii) avoiding
product design and development errors by allowing designers to check the fit,
form and function of new designs prior to mass production and (iii) minimizing
the use of more costly conventional techniques.     
 
  Rapid prototyping also has made it possible to create patterns that are
subsequently converted into usable parts through secondary processes such as
the production of non-durable molds and investment casting. A
 
                                      22
<PAGE>
 
   
common technique for replicating small numbers of parts is to use a non-
durable mold, in which the rapid prototyping pattern is embedded in silicone
rubber that hardens, then is cut open to create a mold. The non-durable mold
is used to replicate parts by injecting the mold with a plastic polymer.
Typically, between 10 and 30 parts can be replicated before the mold breaks
down. The Company believes that the creation of patterns for the production of
non-durable molds is one of the fastest growing applications in the rapid
prototyping market. Investment casting is a common manufacturing process used
for the production of metal parts. For investment casting, a rapid prototyping
pattern is coated with a ceramic slurry (particles suspended in a liquid).
After the slurry has hardened, the ceramic coated pattern is placed in a
furnace where the pattern is burned out leaving a ceramic shell. The ceramic
shell is cooled and molten metal is poured into the shell. When the metal has
hardened, the ceramic shell is removed, leaving a metal part. The usage of
investment casting of rapid prototyping patterns has significantly increased
as a technique for the production of prototype metal parts.     
   
  Four emerging capabilities of rapid prototyping are (i) the creation of core
and cavity metal mold inserts from metal powder for use in plastic injection
molding, (ii) the direct production of prototype metal parts from a range of
metal powders, (iii) the manufacture of flexible parts for automotive,
consumer and medical applications and (iv) the direct manufacturing of sand
molds and cores (patterns placed in sand molds for the purpose of creating
features and voids in a cast metal part) for use in the casting of metal parts
by foundries. The Company believes that its selective laser sintering
technology is the only commercially practiced rapid prototyping process that
allows a user to access all of these capabilities from a single platform.     
 
 Market Direction
   
  According to the most recent data published by industry analysts Wohlers
Associates, the estimated worldwide market for rapid prototyping goods and
services in 1995 was approximately $295 million, a 50 percent increase over
1994. Wohlers Associates projects that the industry will grow at a compound
annual rate of approximately 49 percent for the years 1996 and 1997, reaching
a size of over $650 million. Wohlers Associates further estimated that
suppliers of rapid prototyping systems, services and materials accounted for
about half of the industry's 1995 revenue, with service bureaus accounting for
the remainder. Service bureaus typically offer a full line of product design,
prototyping and limited-run manufacturing services. They are generally used by
companies that may not be able to justify the cost of their own rapid
prototyping system, that have elected to outsource rapid prototyping services
or that may choose to investigate different technologies before making their
own investment in a rapid prototyping system. The Company anticipates that
service bureaus will continue to be a major provider of rapid prototyping
goods and services.     
   
  The Company believes that the emerging ability of rapid prototyping to
manufacture metal parts in a range of materials and to make prototype metal
molds for use in plastic injection molding will expand rapid prototyping
beyond pattern, model and prototype applications, thereby further fueling
market growth. The Company also anticipates that the demand for rapid
prototyping materials and related services will grow significantly as the
installed base increases and that materials and related services will
represent an increasingly significant portion of future total industry
revenues.     
   
  DTM believes that the industry has entered a process of market segmentation
with a high- and low-end distinction emerging. The low-end segment is
characterized by smaller, lower-priced rapid prototyping systems, or "desk-
top" systems. These desk-top systems produce models primarily for evaluating
design form and fit and are designed with an emphasis on speed of part build
as opposed to part accuracy and functionality. Today, this type of application
is served by virtually all existing commercial systems regardless of their
price or size. The high-end market segment is served by rapid prototyping
systems, such as its SLS Systems, that produce functional parts and can be
integrated into rapid manufacturing processes. These systems are generally
larger, more complex, more expensive and more versatile than desk-top systems.
The Company anticipates that integration of high-end systems into the
manufacturing process will occur as rapid prototyping technologies such as
selective laser sintering introduce the capability to manufacture metal parts
directly and quickly produce both tooling that can produce parts and the parts
themselves in the manufacturers' desired quantities and     
 
                                      23
<PAGE>
 
materials of choice. In particular, the Company believes that the key to
continuing widespread acceptance of a particular rapid prototyping system will
be its ability to reduce time to market by quickly producing tooling, either
permanent or prototype, for functional part production.
 
THE DTM RAPID PROTOTYPING SOLUTION
   
  The market for rapid prototyping products and services includes multiple,
competing technologies. DTM believes that it is the only company that markets
selective laser sintering in North America and one of only two companies that
market the technology outside of the United States. The Company believes that
the following characteristics differentiate its selective laser sintering
process from other competing rapid prototyping technologies:     
     
  Wide Range of Applications     
     
  The Company's SLS Systems can currently process seven materials: a
  polycarbonate powder; two nylon powders; ProtoForm powder (a nylon
  composite); RapidSteel powder; TrueForm powder; and SandForm powder. The
  Company recently announced the expected availability of two new products:
  Somos 201 powder, a new material supplied by DuPont that yields highly
  flexible parts with rubber-like characteristics, and VeriForm powder, a
  significantly improved material for functional prototypes. This wide range
  of materials permits the user of an SLS System to produce models, patterns,
  functional prototypes and tooling from one platform. Transition from one
  material to another, and hence from one application to another, generally
  takes less than one hour. The Company does not believe that a potential
  rapid prototyping user could duplicate the SLS Systems' total materials and
  applications capability through the use of any other single rapid
  prototyping system.     
 
  Strong and Durable Functional Plastic Prototypes
     
  The selective laser sintering process produces parts that can be drilled,
  painted, equipped with electronics and mounted in working product
  assemblies that duplicate the final product. Unlike parts produced with
  many other technologies, these prototypes can be used for rigorous testing
  of product designs in harsh conditions such as extreme temperatures and
  high humidity. For example, prototype parts produced using the selective
  laser sintering process have been placed in automobile engines and operated
  for up to 30,000 miles. Product development and design teams can minimize
  performance problems and reduce design errors by testing parts in projected
  use conditions prior to the mass production of a product.     
 
  RapidTool Process Capability
     
  The ability to produce metal mold inserts from metal powder reduces the
  time required to make tooling that can be used to produce up to 80,000
  plastic parts in the material of choice for market testing or introduction.
  Conventional milling and machining techniques can require weeks, and in
  some cases months, and are labor intensive. The RapidTool process can
  produce prototype metal mold inserts in less than 10 working days, with
  minimal supervision. The Company believes that competing, commercial rapid
  prototyping technologies currently do not have the ability to create
  tooling from metal powder. A variation of the Company's RapidTool process
  and RapidSteel material system can also be used to manufacture, in less
  than two working days, epoxy-infiltrated metal cores and cavities that can
  be used on injection molding machines to produce up to approximately 200
  functional parts in the material of choice.     
     
  SLS System Productivity     
     
  The Company believes that its SLS Systems have certain productivity
  advantages over competing rapid prototyping systems. In the selective laser
  sintering process, the unfused powder remains in the build chamber,
  supporting the shape of the part during the build. Due to this support,
  multiple part builds can be stacked in the Company's SLS System's part
  build chamber, which allows the SLS Systems to produce multiple parts in a
  single run. Conversely, many competing technologies require multiple runs
  of a system to create multiple parts. The Company also believes that its
  SLS Systems have certain part build speed     
 
                                      24
<PAGE>
 
     
  advantages over other rapid prototyping technologies. The Company
  anticipates that productivity enhancements now under development could
  result in significant further improvements in 1997.     
 
  Expandable and Upgradable Technology
     
  DTM's selective laser sintering technology has potential for expansion,
  both in terms of improvements to the process and in terms of current and
  potential powdered sintering materials and applications. The Company
  believes that a significant advantage of selective laser sintering is that
  new and improved materials will, in most cases, be capable of being used in
  existing SLS Systems with very few modifications, if any. The Company has
  previously introduced a number of upgrades to the Sinterstation 2000 System
  that allowed SLS System users to capture the benefits of DTM's SLS System
  product improvement programs without having to purchase a new SLS System.
  For example, DTM recently made available to its existing customers a laser
  scanning upgrade that, with an on-site retrofit, provides enhanced part
  accuracy and quality. Additionally, in 1997, the Company expects to make an
  upgrade available to customers who have the Sinterstation 2000 System and
  desire the thermal and scan speed performance capability of the
  Sinterstation 2500 System. The Company expects to begin shipping this
  upgrade package in the middle of 1997. The ability to retrofit SLS Systems
  affords DTM's customers a degree of protection against the rapid
  obsolescence found in many products using other emerging technologies.     
 
BUSINESS STRATEGY
   
  Since its inception, the Company's focus has been on the development and
improvement of the SLS Systems and related materials. During 1995, the Company
also began to concentrate on the development and execution of an international
marketing and distribution strategy for its products. With the advances the
Company has recently achieved in the form of the RapidTool process, the
introduction of ProtoForm, RapidSteel, TrueForm and SandForm powders, the
introduction of the Sinterstation 2500 System and the recently announced
expected availability of Somos 201 and VeriForm powders, the Company believes
that it is positioned to capitalize on its competitive advantages through the
following strategies:     
     
  Increase Share of Existing Market Applications     
     
  The creation of strong and durable parts, as well as patterns for secondary
  processes, are two of the fastest growing existing applications in the
  rapid prototyping industry. The Company believes that its ProtoForm powder
  has allowed it to become a leading supplier of rapid prototyping systems
  for use in the production of functional prototypes. The Company anticipates
  expanding its position in this area by introducing an improved functional
  prototyping material that gives users the ability to produce parts with
  significantly improved resolution and surface finish. Additionally,
  TrueForm powder allows the SLS System user to manufacture non-durable
  patterns that can be used to fabricate non-durable molds, as well as to
  create cast parts through investment casting. The Company believes that its
  TrueForm powder has enhanced DTM's ability to market the SLS Systems to
  customers in the fast growing pattern segment of the rapid prototyping
  market. The Company also has been engaged in raising the awareness of users
  of investment casting technology of the benefits of using TrueForm for the
  production of high quality cast metal parts. The Company expects to realize
  increased market share as customer awareness of the benefits of these
  materials increases.     
 
  Capitalize on RapidTool Process Capability
     
  DTM plans to pursue a leadership role in metal injection mold insert
  applications by marketing the proprietary RapidTool process to tool making
  operations within OEMs, service bureaus and tool manufacturing companies.
  The Company believes that the successful introduction of its RapidTool
  process will facilitate the integration of the selective laser sintering
  technology into manufacturing processes, an area that has experienced
  limited penetration by other rapid prototyping techniques. The Company
  intends to improve the RapidTool process by introducing enhancements that
  will allow for a significant reduction in the cycle time to produce a core
  or cavity.     
 
                                      25
<PAGE>
 
  Expand Selective Laser Sintering Materials Offerings
     
  Based upon recent successful new materials introductions, the Company
  believes that it has established the requisite expertise and processes with
  which to further broaden its selective laser sintering materials product
  line. Preliminary experiments, coupled with the proven diversity of the
  selective laser sintering materials capability, lead the Company to believe
  that in the future it should be possible to (i) broaden the performance of
  the selective laser sintering process to include the production of metal
  prototype parts, (ii) develop new and improved functional plastic
  prototyping materials, (iii) broaden the selective laser sintering metal
  mold inserts product line to include additional durable materials, (iv)
  introduce an improved RapidSteel materials system which allows for the
  production in less than 48 hours of epoxy-infiltrated metal molds that have
  a mold production life of up to approximately 200 parts, an application not
  efficiently served by current rapid prototyping technology and (v) develop
  a ceramic-based materials system for the production of tools and parts. The
  Company believes that as a result of this strategy, recurring sources of
  revenue, such as materials, will become an increasingly larger portion of
  total revenues.     
     
  An example of the Company's ability to expand its offering of selective
  laser sintering materials is the recent introduction of SandForm powder.
  SandForm powder is used by foundries for the quick and direct production of
  sand molds and cores for the casting of metal parts. Sand molds and cores
  are used for casting metal parts worldwide, particularly for the mass
  production of automotive engine and drive train components. The Company
  believes that selective laser sintering is the only rapid prototyping
  technology capable of the direct manufacture of sand molds and cores.     
 
  Broaden SLS System Product Line
     
  The Company's strategy is to continue to pursue the development of more
  advanced SLS Systems. An example of this strategy is the Company's recent
  introduction of the Sinterstation 2500 System, an SLS System with a larger
  part build chamber than the Sinterstation 2000 System and certain other
  productivity improvements. The Sinterstation 2500 System, coupled with the
  Sinterstation 2000 System, provides the Company with a family of SLS
  Systems to offer to both existing and prospective customers. In addition,
  the Company has announced that existing owners of its Sinterstation 2000
  System will have the ability to upgrade to the performance capability of a
  Sinterstation 2500 System and that it intends to begin shipping the upgrade
  in 1997. The Company also intends to introduce during 1997 the
  Sinterstation 2000 GT System, a system that has the speed and performance
  capability of the Sinterstation 2500 System with the smaller part build
  chamber of the Sinterstation 2000 System.     
 
  Expand Distribution Network
     
  The Company intends to continue to expand its direct sales force, agent
  network and service and support capabilities. Specifically, the Company
  intends to increase its direct sales force in Western Europe and North
  America, establish a direct sales force in the Pacific Rim and extend its
  agent network into additional key South American, Pacific Rim and Eastern
  European countries. Expansion of the Company's field service and support
  functions is expected to parallel the growth of the installed System base.
  The Company intends to emphasize its commitment to customer support by
  decentralizing its field service and applications support resources into
  regional offices, thereby minimizing its response time to customer support
  requests.     
 
DTM'S SELECTIVE LASER SINTERING TECHNOLOGY
 
 The Selective Laser Sintering Process
 
  The Company's SLS Systems employ a combination of software and hardware to
produce plastic models, functional prototypes and patterns from powdered
materials. The patterns can, in turn, be used for secondary processes such as
the production of non-durable molds and investment casting. SLS Systems also
can be used to
 
                                      26
<PAGE>
 
produce metal prototype mold inserts. Customers input designs into the SLS
Systems in the form of CAD drawings, typically in STL format, an industry-
standard file type that most CAD systems can generate. From the CAD file, SLS
Systems quickly and accurately produce models, prototypes, patterns and
tooling in the specified shape.
 
  The Company's selective laser sintering process uses laser energy to sinter
powdered material to create solid objects. The object described by the CAD
file is built layer by layer using the following technique:
 
  . As the selective laser sintering process begins, a thin layer of the
    heat-fusible powder is deposited into the part build chamber.
 
  . An initial cross-section of the object under fabrication is selectively
    "drawn" on the layer of powder by a heat-generating CO/2/ laser. The
    interaction of the laser beam with the powder elevates the temperature to
    the point of melting, fusing the powder particles and forming a solid
    mass. The intensity of the laser beam is modulated to melt the powder
    only in areas defined by the object's design geometry.
 
  . An additional layer of powder is deposited via a roller mechanism on top
    of the previously scanned layer.
 
  . The process is repeated, with each new layer fusing to the layer below
    it. Successive layers of powder are deposited and the process is repeated
    until the part is complete.
 
 The RapidTool Process
   
  The RapidTool process employs selective laser sintering to produce
steel/copper composite mold inserts. RapidSteel powder, DTM's polymer-coated
steel powder, is placed in the SLS System. A "green" part (which consists of
metal powder held together by the polymer) is then produced by using the laser
to selectively sinter the polymer binder and effectively bind the metal
particles together, replicating the mold inserts described in a CAD file. This
part is formed using the same layer by layer manufacturing process that is
used to make plastic parts. The green part is dipped in a polymer binder
solution that infiltrates the part and, after drying for several hours, gives
the green part the hardness necessary for the subsequent process step in a
furnace. The furnace cycle consists of a multi-stage firing cycle. The first
stage burns out the remaining polymers from the steel matrix, the second stage
lightly sinters the metal particles together and the final stage infiltrates
copper into the steel matrix. The green part also can be infiltrated with an
epoxy material to form a core and cavity capable of producing up to
approximately 200 parts on an injection molding machine in the material of
choice.     
 
PRODUCTS
 
 The Sinterstation Systems
 
  The Sinterstation Systems contain three key hardware modules: (i) the Powder
Engine Module, where the laser sinters the powdered material and builds the
prototype, model or mold insert; (ii) the Controls Module, which contains the
computer and system operator's console for running the SLS Systems; and (iii)
the Environment Control Module, which regulates the temperature and atmosphere
of the build chamber. The size and number of objects that can be built in the
build chamber varies depending on the part size, type of sintering powder used
and part configuration. Objects that are larger than the size of the build
chamber can often be built in pieces and then assembled with no sacrifice in
strength or accuracy.
 
  The Company has developed a large library of application software designed
to control the selective laser sintering process. This software sets
parameters and directs the various components of the platform hardware based
on the type of material being used in the build process. The Company also has
designed a range of service, support and utility software programs to assist
customers in optimizing the prototype and mold building process. For example,
one of the Company's productivity programs organizes multiple parts within the
build chamber for maximum space utilization.
   
  The Company's SLS Systems can be configured for use with a single powder or
for any combination of thermoplastics and metal. The list prices for
Sinterstation Systems range from $299,000 to approximately     
 
                                      27
<PAGE>
 
   
$500,000, depending on the options selected by the customers. Systems
typically include the SLS System platform including all three modules,
material handling equipment, documentation, software licenses, licenses for
using DTM-supplied powdered material and installation. Some of these options
may increase the purchase price of the System. The purchase price also
includes a one-week training course in operation of the SLS System for up to
two of the customer's personnel.     
 
 Sintering Materials
          
  The Company's materials are sold in drums. The list prices for the following
powdered materials range from $23 to $60 per pound, depending on the material,
except for SandForm powder, which sells for $4.50 per pound. Characteristics
and uses of selective laser sintering powders available through DTM for use in
its Sinterstation Systems are as follows:     
 
<TABLE>   
<CAPTION>
     MATERIAL/
  YEAR INTRODUCED        DESCRIPTION         CHARACTERISTICS                 USES
<S>                   <C>               <C>                        <C>
VERIFORM POWDER 1997  DTM-developed     Tough, high strength mate- Designed for testing
                      high resolution   rial creates parts with    functional prototypes in
                      engineering       excellent feature defini-  high stress, harsh envi-
                      thermoplastic     tion in one of several     ronments and other de-
                                        colors                     manding applications
                                                                   where the prototype
                                                                   needs to operate like
                                                                   the final product.
- -------------------------------------------------------------------------------------------
SOMOS 201 POWDER      DuPont-developed  Highly ductile rubber-like Flexible functional pro-
1997                  elastomeric en-   material that can with-    totypes of rubber and
                      gineering poly-   stand "under-the-hood"     specialized plastic
                      mer               high temperatures and      parts such as hoses,
                                        harsh environments         gaskets, moldings seals,
                                                                   athletic shoes and medi-
                                                                   cal models.
- -------------------------------------------------------------------------------------------
SANDFORM POWDER       Polymer-coated    Interchangeable with ex-   Sand molds and inserts
1996                  zirconium sand    isting sand mold and core  for casting parts in a
                      particles         materials; particle size   variety of metals.
                                        and material characteris-
                                        tics that enable fast pro-
                                        duction of smooth sand
                                        mold patterns
- -------------------------------------------------------------------------------------------
TRUEFORM POWDER       DTM-developed     Capable of producing ex-   Patterns for casting
1996                  polymer with      tremely smooth, accurate   single metal parts or
                      very fine parti-  pattern masters            low-quantity plastic
                      cle size and                                 parts with complex geom-
                      spherical shape                              etry; thin wall struc-
                                                                   tures where surface fin-
                                                                   ish is important.
- -------------------------------------------------------------------------------------------
RAPIDSTEEL POWDER     DTM-developed     Creates durable metal mold Injection mold core and
1995                  carbon steel      inserts that can produce   cavity inserts for pro-
                      particles with a  thousands of plastic parts totype hard tooling us-
                      special polymer                              ing DTM's RapidTool
                      coating                                      process.
- -------------------------------------------------------------------------------------------
PROTOFORM POWDER      DTM-developed     Extremely durable, flexi-  Prototypes with fine de-
1995                  composite mate-   ble and strong; stands up  tail and high strength
                      rial consisting   to harsh chemicals and de- where testing in harsh
                      of nylon and      manding temperature        conditions is required.
                      spherical glass   environments               Can also be used to make
                      particles                                    models.
- -------------------------------------------------------------------------------------------
NYLON AND FINE NYLON  Engineering       Durable material that can  Functional prototypes of
1993/1994             thermoplastic     be drilled, painted and    actual products that re-
                                        used in environments simi- quire snap fits. Can
                                        lar to the end product;    also be used to make
                                        offers substantial heat    models.
                                        and chemical resistance
- -------------------------------------------------------------------------------------------
POLYCARBONATE         Engineering       Durable and heat resistant Conceptual models and
1991                  thermoplastic                                durable pattern masters
                                                                   for plastic short run
                                                                   tooling, metal invest-
                                                                   ment casting and sand
                                                                   casting.
- -------------------------------------------------------------------------------------------
</TABLE>    
 
 
                                      28
<PAGE>
 
   
  The Company sells its SLS Systems with the materials capabilities selected
by the customer and an initial supply of powders. Thereafter customers can add
materials capabilities by purchasing materials start-up modules, which include
an initial supply of materials plus the software developed by the Company for
optimal processing of that particular material. The Company subcontracts with
other manufacturing organizations for the production of sintering materials or
obtains those materials directly from the producer. The Company follows a
practice of single sourcing materials with these suppliers.     
 
 Other Products
 
  Along with the Sinterstation Systems and powdered sintering materials, the
Company supplies ancillary equipment used for finishing parts as well as
processing and handling powdered materials. These products are offered by DTM
primarily as a convenience to its customers. However, a specialized furnace
used as part of the Company's RapidTool process is manufactured expressly for
DTM, which holds the worldwide marketing rights. In addition, DTM is currently
the exclusive source of a custom workbench for recycling powder, which is also
manufactured solely for the Company.
 
RESEARCH AND NEW PRODUCT DEVELOPMENT
 
  The Company's research and development effort focuses on improving core
technologies that are critical to future growth. These include development of
new materials, as well as improved powder handling technology, laser beam
delivery systems and thermal control systems. The Company's development
efforts are enhanced through informal development arrangements with key
customers, materials suppliers and hardware suppliers. The Company also
collaborates on research and development with The University of Texas as well
as other universities and research institutions that operate SLS Systems.
   
  During 1994, 1995 and 1996, the Company devoted approximately $3.8 million,
$3.5 million and $4.3 million to research and development, respectively. These
expenditures have resulted in ongoing improvement in the selective laser
sintering technology. The Company's Sinterstation Systems have been improved
significantly since the first commercial sale in 1992, which improvements have
resulted in higher degrees of accuracy, reliability and productivity. Recent
research and development successes in the powder and process area include the
introduction of a second nylon powder in 1994, the commercial release of
ProtoForm powder in early 1995, the introduction of the RapidTool process and
related RapidSteel powder in late 1995, the commercial release of TrueForm
powder in early 1996 and SandForm powder in the third quarter of 1996 and the
introduction of the Sinterstation 2500 System in September 1996. The Company
recently announced the expected availability of two new powders: Somos 201
powder, a new material supplied by DuPont that yields highly flexible parts
with rubber-like characteristics, and VeriForm powder, a significantly
improved material for functional prototypes.     
 
  Longer term, the Company believes that the selective laser sintering
technology is capable of processing an even wider range of materials, thereby
improving the performance of the Company's products in existing applications
and advancing the technology into new applications. Based on preliminary
experiments, coupled with the proven diversity of the selective laser
sintering materials capability, the Company believes that it should be able to
(i) broaden the performance of the SLS System to include the production of
prototype metal parts, (ii) develop new and improved functional plastic
prototyping materials, (iii) broaden the metal mold inserts product line to
include additional durable materials and (iv) develop ceramic materials for
the production of special tooling and part applications.
 
MARKETING AND CUSTOMERS
 
 Customers
   
  Rapid prototyping systems are purchased by OEMs, universities, military and
defense organizations and service bureaus. Past purchasers of the Company's
SLS Systems include The Boeing Company, Eastman     
 
                                      29
<PAGE>
 
   
Kodak Company, Fiskars Oy, Ford Motor Company, General Motors Corporation,
Hughes Christensen, LG Electronics, Inc. (Goldstar), Mercedes-Benz AG, Pratt &
Whitney, Rockwell International Corporation, Samsung Electronics Co., Ltd.,
Toyota Motor Corporation and Whirlpool Corporation, among others. In addition,
universities and technical transfer centers in 12 countries had purchased SLS
Systems as of December 31, 1996. The Company also sells a substantial portion
of SLS Systems to service bureaus. In 1996, 46.5 percent of the Company's
revenues were derived from the sales of products and services to service
bureaus, and the Company anticipates that service bureaus will continue to
provide a significant portion of its revenues. Many of the Company's customers
have purchased more than one SLS System and, based on these experiences, the
Company anticipates a significant repeat business with its existing customers.
       
  Generally, the Company's revenues are derived from sales to a wide variety
of customers. However, during 1995 approximately 15 percent of total revenues
were derived from sales to one customer. In 1994 and 1996, the Company did not
have a customer representing 10 percent or more of sales revenues. While the
Company anticipates that occasional multiple unit purchases by a single
purchaser could result in a large percentage of total sales being concentrated
in one customer from time to time, it does not consider itself dependent on
any particular customer.     
 
 Product Distribution
   
  The Company distributes its products in the United States, Canada, Western
Europe and key Pacific Rim and South American countries. In the United States
and Canada, the Company employs a direct sales force augmented by agents in
the Upper Midwest. In Germany, the Company's products are distributed by DTM
GmbH, a wholly owned German subsidiary. DTM GmbH is a sales and service
organization whose efforts are augmented by sales agents in France, Italy,
Portugal, Spain, Sweden and the United Kingdom. The Company also distributes
its goods and provides services in the Pacific Rim and South America through a
network of agents, including agents in Argentina, Australia, Brazil, China,
Hong Kong, India, Indonesia, Japan, Malaysia, Singapore, South Korea and
Taiwan. As of December 31, 1996, the Company had shipped SLS Systems to
customers in a total of 17 countries.     
   
  DTM's sales agents are selected for their sales and product service
capabilities. They generally are experienced in selling products in fields
related to rapid prototyping, but agree contractually to represent the
Company's products exclusively in the field of rapid prototyping. The sales
agents periodically undergo refresher training in SLS System service.
Throughout the next year, the Company intends to continue the expansion of its
direct sales force, agent network and service and support capabilities.     
 
 Marketing and Sales
 
  The Company's marketing programs utilize a mix of seminars, trade shows,
direct mailings, literature, videos, press releases, telemarketing, brochures
and customer and application profiles to identify prospects that match a
typical SLS System user profile. The Company also focuses its marketing
resources on expanding the use of the selective laser sintering technology by
existing customers. This strategy includes marketing SLS Systems, upgrades and
related products.
 
 The Company views ongoing sales to service bureaus as important to its
overall business strategy and focuses a significant share of its marketing and
selling resources on these target customers. In early 1996, the Company
introduced its "DTM OnBoard" marketing program. DTM OnBoard is a strategic
partnering effort between DTM and service bureaus. Upon enrollment in DTM
OnBoard, the Company trains the service bureau's personnel to promote
selective laser sintering applications, conducts joint seminars and direct
mail campaigns for sales lead generation and carries out a cooperative
marketing program.
 
  The Company offers an SLS System rental program for customers who wish to
test the selective laser sintering technology prior to making a purchase
commitment or who wish to get an early start on implementation of the process
while waiting for completion of their internal funding process.
 
                                      30
<PAGE>
 
SERVICE AND SUPPORT
 
  The Company maintains a staff of field service and support personnel in
Europe and North America. The field service organization is responsible for
installations of new SLS Systems and for conducting the Company's warranty
service and maintenance program. The Company's sales agents in the Pacific Rim
and South America also are trained to service SLS Systems. As a result of the
capability of the Company's field service organization and its trained agents,
the Company's response time to customer requests for assistance is generally
24 hours or less. The Company's applications support personnel assist
customers with SLS System operations and provide advice and assistance on
building unusually complicated parts. The applications team also is charged
with keeping customers informed of changes and advancements in the selective
laser sintering technology or SLS System operating procedures.
   
  The Company is in the process of decentralizing its field service and
applications groups in order to maintain its high level of customer service.
In the United States, a service facility was opened in the Detroit area in
early 1996. Further decentralization in North America will occur in 1997. The
Company has also expanded its Pacific Rim field service capability by
establishing a field service office in Singapore in January of 1997.     
 
  The Company provides each new customer with a one-week training course in
advance of delivery of its SLS System. The course covers SLS System operation
and preventive maintenance procedures, materials and process information,
safety training and problem-solving techniques. The class includes formal
classroom instruction, guided user-interface simulations and actual SLS System
operation in the DTM applications laboratory. Supplemental technical
assistance is provided to customers through a telephone customer support line
or additional on-site training that can be scheduled at the customer's
request. Furthermore, when customers add metal powder capability, the Company
provides additional RapidTool process training at its facilities in Austin,
Texas.
   
  The Company's SLS Systems are sold with a comprehensive 12-month warranty on
parts and labor, which excludes consumable items and the laser charge. The
Company's customers may continue the level of service provided by the initial
12-month warranty by purchasing an annual maintenance contract. The
maintenance contract provides comprehensive part and labor coverage,
preventive maintenance and software upgrades. Historically, annual maintenance
contracts have been purchased for the majority of the Systems sold after
expiration of the initial warranty period. For those customers choosing not to
purchase annual maintenance contracts, DTM also provides repair and
maintenance services on a time and materials basis.     
 
MANUFACTURING
   
  The Company's manufacturing strategy is based on the outsourcing of major
sub-assemblies of the Sinterstation Systems, which include the Powder Engine
Module, Controls Module and Environment Control Module. The sub-assemblies are
built by different suppliers and shipped to Austin, Texas, for assembly. The
Company performs final assembly by connecting the sub-assemblies and adding
other key components. The SLS System then is put through extensive calibration
and testing, which includes making parts from various materials. A final
quality check precedes clean-up and packaging for shipment. Assembly and final
testing at the Company's site comprises a 21-day cycle. When the SLS System
arrives at the customer's location, DTM personnel install it and perform on-
site testing over a period of two to three days. The Company also assembles
upgrade packages and, in some cases, installs those packages.     
 
  Procurement lead time for the major sub-assemblies of the SLS Systems can be
up to 16 weeks. Due to the Company's long lead time for major sub-assemblies,
it places orders for such parts on a forecast basis with the intention of
moving raw materials inventory immediately into work in process. The Company
involves its suppliers in the design and testing stages of new components in
order to improve manufacturability. The Company believes that the benefits of
maintaining close relationships with its suppliers are more cost efficient
product designs and the ability to control manufacturing costs. While the
Company subcontracts for manufacture of SLS System components, powdered
sintering materials and accessories from single-source, third-party suppliers,
multiple sources exist for almost all of the components of the Company's
products.
 
                                      31
<PAGE>
 
   
  The Company's manufacturing facilities in Austin, Texas, are currently
configured to assemble and test the SLS Systems. The Company believes that it
will have sufficient manufacturing capacity to fulfill demand for its SLS
Systems in 1997. The Company expects that it will lease additional space for
its operations in late 1997.     
 
INTELLECTUAL PROPERTY
   
  The selective laser sintering technology was initially developed by
researchers at The University of Texas. The first selective laser sintering
patent was issued to The University of Texas in 1989. DTM has an exclusive
worldwide license from The University of Texas to use the selective laser
sintering technology (the "License"), the term of which continues until
expiration of the patent rights that are the subject of the License. The
License includes the original patents plus a right of first refusal for all
improvements thereon. It requires that DTM commercialize the technology, which
it has done and continues to do. Under the License, DTM is required to make
royalty payments equal to four percent of net sales of SLS Systems and certain
powdered materials. In connection with obtaining the License, the Company
issued 27,300 shares of Common Stock to The University of Texas. Under the
License, The University of Texas reserves the right to practice the patented
technology for research and educational purposes. The License can be
terminated by The University of Texas (i) if DTM becomes bankrupt or
insolvent, (ii) if DTM commits a material breach or default and fails to cure
that breach or default within 90 days of notice thereof or (iii) as to foreign
jurisdictions, after 1997, if DTM fails to commercialize the technology in
that jurisdiction. The License provides that DTM will indemnify The University
of Texas from expenses or damages incurred by The University of Texas arising
from DTM's use of the licensed subject matter.     
   
  The Company has further refined and improved the selective laser sintering
process and materials and has been issued patents in its own name for many of
those developments. As of February 5, 1997, the Company owned or had exclusive
licenses to 25 U.S. patents and nine pending U.S. applications. As of the same
date, the Company owned or had exclusive licenses to four European patents,
five pending European applications and five international Patent Cooperation
Treaty applications. In addition, the Company owns or has exclusive rights to
seven issued patents and 19 pending applications in countries outside of the
United States and Europe. Technology that is covered by existing patents or is
the subject matter of pending patent applications includes some or all of the
following: (i) the fundamental elements of the selective laser sintering
process; (ii) related inventions on powder delivery, beam delivery and thermal
control; (iii) certain of the sintering powders that DTM has developed; (iv)
certain combinations of powdered materials; and (v) certain post-processing
steps for part finishing. Pending patent applications cover recent
developments in composite materials, as well as specially tailored powder
formulations that produce exceptional feature detail and surface finish. It is
anticipated that DTM will make additional patent application filings as a
result of research currently in progress.     
   
  Some of the Company's patents have been acquired from third parties other
than The University of Texas. DTM acquired certain patents in the powdered
materials area through assignment from BFGoodrich in 1992. Also in 1992, DTM
acquired a patent that was originally issued to Ross Housholder in 1981. The
Company believes that the Housholder patent is a pioneer patent in the rapid
prototyping field.     
   
  Most of the key claims of the U.S. patents covering selective laser
sintering, excluding the Housholder patent, have been submitted
internationally. The first European Patent Convention patent, which was issued
by the European Patent Office ("EPO") in December 1994, gives patent
protection in Austria, Belgium, France, Germany, Italy, the Netherlands,
Sweden, Switzerland and the United Kingdom. However, this patent is the
subject of an opposition proceeding before the EPO that was initiated by a
competitor of the Company. The competitor initially alleged that the patent
claims have been the subject of an unallowable amendment and that the subject
matter is not novel and does not involve an inventive step. The Company
received a favorable initial ruling from the EPO in response to these
allegations. However, the competitor has recently filed papers before the EPO
that again allege the patent is invalid, citing new arguments for its
positions. The Company has responded to these arguments, intends to defend the
validity of this patent vigorously, and believes that it has a sound position
in that regard. The Company is the plaintiff in a lawsuit in the United States
involving claims of infringement of certain of the Company's patents and has
initiated similar litigation in Europe. See "Business--Legal Proceedings."
    
                                      32
<PAGE>
 
   
  The Company has three trademarks registered with the U.S. Patent and
Trademark Office and has filed applications for registration in the United
States of an additional five trademarks.     
 
LEGAL PROCEEDINGS
   
  DTM filed an action in the United States District Court for the Eastern
District of Wisconsin in October 1995 against three parties who are operating
an SLS System. DTM alleges that the defendants willfully infringed a DTM
patent. In June 1996, DTM amended its lawsuit to also assert that one of the
defendants breached an oral settlement agreement. The Company seeks injunctive
relief, damages and attorneys fees. The defendants have denied infringement
and the existence of an oral settlement agreement, and the defendants seek
attorneys fees. The defendants have also asserted the affirmative defenses of
patent invalidity, implied license, failure to mark patented articles, patent
unenforceability and invalidity of the oral settlement agreement. Discovery
commenced in late 1995 and is ongoing. In a subsequent filing, one of the
defendants also has asserted claims against DTM and BFGoodrich for violation
of state and federal antitrust laws. That defendant seeks injunctive relief as
well as damages and attorneys fees. DTM and BFGoodrich have indicated that
they believe that the subsequent counter and cross claims for violation of
antitrust laws are without merit. It is not possible at this time to predict
the outcome of this proceeding, although a ruling unfavorable to the Company
could have a material adverse effect on the Company's business and financial
performance.     
   
  The Company initiated patent infringement litigation in March 1996 in the
3rd Chamber--1st section of the Court of Paris, France against EOS GmbH
("EOS"), a German competitor, against EOS S.A (France) and against one of
EOS's customers. The Company also initiated patent infringement litigation in
April 1996 in the County Court No. 1 in Munich, Germany against EOS and one of
EOS's customers, and in December 1996 initiated similar litigation in the
court of Pinerolo, Italy, against EOS and one of EOS's customers. In each of
these cases, the Company has alleged that EOS is selling rapid prototyping
systems in Europe that make unauthorized use of selective laser sintering
technology covered by the European patent under which DTM has exclusive
rights. The Company seeks injunctive relief plus damages. It is anticipated
that this litigation will be pursued in conjunction with the EPO proceeding in
which EOS has opposed the validity of that European patent. It is not possible
at this time to predict the outcome of these proceedings. See "Business--
Intellectual Property."     
 
COMPETITION
 
  The market for rapid prototyping systems and materials is highly
competitive. Several United States-based companies other than DTM are in
various stages of developing and marketing rapid prototyping systems and
services. These companies include 3D Systems Corporation ("3D Systems"), BPM
Technology, Inc., Helisys, Inc. ("Helisys"), Sanders Prototype, Inc., Soligen
Technologies, Inc. and Stratasys, Inc. ("Stratasys"). Of these, 3D Systems,
Helisys and Stratasys compete with DTM on a worldwide basis. The Company also
faces competition in various regions outside North America from companies such
as EOS and several Japanese companies, including CMET (Mitsubishi) and D-MEC
(Sony-JSR).
 
  A number of the companies participating in the rapid prototyping industry
have developed or may be developing desk-top systems that are sold or will be
sold primarily on the basis of price. DTM believes that these companies
include 3D Systems, BPM Technology, Inc., Denken Engineering Co., Ltd.,
Helisys, Kira Corporation, Sanders Prototype, Inc. and Stratasys, among
others. Their products are based on ink jet printing, plastic extrusion or
paper laser cutting and laminating technologies. The Company expects that low-
end products eventually will be priced at less than $50,000. Competing for the
low-end desk-top market segment is not part of the Company's business strategy
and the Company does not consider the desk-top systems to provide competition
in the high end of the market.
 
  The Company believes that its principal competitors for the plastic model,
functional prototype and pattern-creation segments of the rapid prototyping
market are 3D Systems, EOS and CMET (Mitsubishi). They employ a
stereolithography ("SLA")-based process that utilizes ultraviolet light
sources to polymerize liquid monomers into a solid plastic object. 3D Systems
was the first company to commercially introduce rapid prototyping
 
                                      33
<PAGE>
 
   
technology. The Company competes with 3D Systems on a worldwide basis and
anticipates that its competition with CMET (Mitsubishi) primarily will be
confined to Japan. EOS, located in Munich, Germany, markets systems based on
both SLA and SLS technologies, principally in Western Europe. EOS has been
sued in Germany by DTM for infringement of selective laser sintering
technology patents. See "Business--Intellectual Property" and "Business--Legal
Proceedings." The Company considers a process marketed by 3D Systems to be
potential worldwide competition for its RapidTool process and an EOS process
to be a competitor of the RapidTool process in Europe.     
 
  The Company competes for business with other rapid prototyping companies
primarily on the basis of product performance, reliability, accuracy and
versatility, as well as price and product service. The Company also competes
for business with conventional machining and milling techniques, which
continue to be the most common methods by which plastic models, functional
prototypes and tool inserts are manufactured.
 
EMPLOYEES
   
  At December 31, 1996, the Company had 114 employees. Approximately 36.0
percent of the Company's employees are involved in engineering, research and
development and engineering product support. The remaining employees are
engaged in sales, marketing, finance and administration. None of the Company's
employees is represented by a union, and the Company has no prior experience
with a work stoppage. The future success of the Company depends on its ability
to attract and retain a qualified work force including employees with critical
engineering and selling skills.     
 
FACILITIES
   
  The Company currently occupies a 30,000-square foot facility at 1611 Headway
Circle, Building 2, Austin, Texas. The Company's lease on this facility
expires November 30, 1997, at which time the Company has an option to renew
the lease at then-current market rates. This facility houses the bulk of the
Company's operations except for off-site sales offices located in various
areas of the United States and offices of the Company's German subsidiary,
which are leased. The Company also leases a warehouse in Austin, Texas,
primarily for the purpose of maintaining an inventory of selective laser
sintering powders. DTM expects that such facilities will be sufficient to
support the Company's operations through the remainder of 1997. The Company
expects that it will acquire additional space for its operations in late 1997.
See "Business--Manufacturing."     
 
                                      34
<PAGE>
 
                                  MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
   
  The executive officers and directors of the Company and their ages as of
February 15, 1997 are set forth below. All directors were re-elected on March
19, 1996. The term of each director will continue until the 1997 annual
meeting of the Company's shareholders.     
 
<TABLE>   
<CAPTION>
          NAME            AGE                             POSITION
          ----            ---                             --------
<S>                       <C> <C>
D. Lee Tobler...........   63 Chairman of the Board and Director
John S. Murchison, III..   56 Chief Executive Officer, President and Director
Michael A. Ervin........   54 Vice President, Engineering
Uday Bellary............   42 Vice President, Chief Financial Officer, Treasurer and Secretary
Thomas L. Lee...........   43 Vice President, Marketing
Marshall O. Larsen......   48 Director
Alexander MacLachlan....   64 Director
Thomas G. Ricks.........   43 Director
Steven G. Rolls.........   42 Director
</TABLE>    
 
  D. Lee Tobler is Chairman of the Board of the Company. He has served in that
capacity since March 1996 and as a director since September 1993. Mr. Tobler
is currently Executive Vice President and Chief Financial Officer of
BFGoodrich, the Company's majority shareholder, having joined BFGoodrich in
those capacities in early 1985 and having served as a director of BFGoodrich
since April 1985. Mr. Tobler is a member of the Company's Audit, Compensation
and Financial Policy Committees.
 
  John S. Murchison, III joined the Company as Chief Executive Officer and
President in September 1990. He was a Director of the Company from September
1990 through September 1993 and currently serves as a Director, having been
again elected as a member of the Board of Directors in March 1996. Prior to
joining the Company, Mr. Murchison was a General Manager for The Pratt Group,
a privately held Australian-based company with worldwide holdings in
packaging, insurance, banking and trading, from 1987 to 1990.
   
  Michael A. Ervin, the Company's Vice President, Engineering, joined DTM in
April 1993. He had 22 years of experience in manufacturing, research and
development with DuPont prior to joining DTM. Most recently, he was Vice
President of Research and Development for DuPont's Imaging System and Medical
Products Sector from 1990 to 1992.     
          
  Uday Bellary joined the Company in February 1997 as Vice President, Chief
Financial Officer, Secretary and Treasurer. Prior to joining DTM, he served as
Director of Finance for Cirrus Logic, Inc., a manufacturer of semiconductor
chips, having served that company in various finance and accounting functions,
since May 1990. Prior to that, he was with Intel Corporation, Conner
Peripherals, Inc., Pritchard Services PLC and Price Waterhouse LLP. Mr.
Bellary is also a certified public accountant.     
       
  Thomas L. Lee joined the Company in October 1995 as Vice President,
Marketing. From February 1993 to September 1995, Mr. Lee was a Marketing
Consultant for Foundation Marketing. He was a Division Marketing Manager for
Tektronix, Inc., a manufacturer of test and measurement instrumentation
systems from October 1991 to February 1993. From July 1990 to October 1991, he
was a marketing manager for Sequent Computer Systems. More than 12 years of
his career were spent in marketing and management roles at Intel Corporation.
       
  Marshall O. Larsen has served as a Director of the Company since January
1996. Mr. Larsen is the President and Chief Operating Officer of BFGoodrich
Aerospace, one of two major business segments of BFGoodrich. He joined
BFGoodrich in 1977 and has served in various managerial positions, including
assistant to the President, and most recently, Group Vice President,
BFGoodrich Aerospace. He is a member of the Company's Compensation and
Financial Policy Committees.
 
                                      35
<PAGE>
 
  Alexander MacLachlan has served as a Director of the Company since March
1996. From December 1994 to March 1996, Mr. MacLachlan served as Deputy Under
Secretary for the U.S. Department of Energy with oversight responsibilities
for technology transfer and laboratory operations. Prior to that time, he held
the position of Senior Vice President, Research and Development, and Chief
Technical Officer for DuPont beginning in 1986. He is a member of the
Company's Audit Committee.
   
  Thomas G. Ricks has served as a Director of the Company since May 1988. From
August 1991 to March 1996, he served as Chairman of the Board of the Company.
Since March 1996, he has served as President and Chief Executive Officer of
The University of Texas Investment Management Company, a non-profit
corporation engaged exclusively in providing investment management services to
the Board of Regents of The University of Texas, a minority shareholder in the
Company. From August 1988 through March 1996, he held several financial and
asset management positions at The University of Texas. Mr. Ricks serves as a
member of the Audit, Compensation and Financial Policy Committees of the Board
of Directors. Mr. Ricks also is a director of the Newfield Exploration Company
and BDM International, Inc.     
 
  Steven G. Rolls has served as a Director of the Company since August 1994.
Mr. Rolls joined BFGoodrich as a Financial Analyst in 1981 and progressed
through a number of positions, including, most recently Vice President,
Finance of BFGoodrich Aerospace from 1989 until being elected Vice President
and Controller of BFGoodrich in 1993. He is a member of the Company's Audit
and Financial Policy Committees.
 
EXECUTIVE COMPENSATION
   
  The following table sets forth information concerning compensation of the
Company's Chief Executive Officer and its two other most highly compensated
executive officers (collectively, the "Named Officers") having annual cash
compensation of $100,000 or more for services rendered in all capacities to
the Company during the fiscal year ended December 31, 1996:     
 
                          SUMMARY COMPENSATION TABLE
 
<TABLE>   
<CAPTION>
                             ANNUAL COMPENSATION   LONG TERM COMPENSATION
                             --------------------------------------------
                                                   SECURITIES UNDERLYING   ALL OTHER
NAME AND PRINCIPAL POSITION    SALARY      BONUS       OPTIONS(#)(1)      COMPENSATION
- ---------------------------  ------------ ------------------------------- ------------
<S>                          <C>          <C>      <C>                    <C>
John S. Murchison, III,
 President..............     $    150,000      --         106,104          $1,301(2)
Michael A. Ervin, Vice
 President,
 Engineering............          140,000      --          53,052                --
Thomas L. Lee, Vice
 President, Marketing...          120,000      --          23,210                --
</TABLE>    
- --------
          
(1) Consists of immediately exercisable options to be issued upon conversion
    of SARs granted under the Equity Appreciation Plan in connection with the
    closing of the Offering described herein. The number of SARs granted was
    as follows: Murchison, 160,000 units; Ervin, 80,000 units; and Lee, 35,000
    units. See "Management--Equity Appreciation Plan."     
   
(2) Consists of portions of club membership dues attributable to personal use.
        
                                      36
<PAGE>
 
          
  The following table sets forth information regarding the exercise and value
of EAP Options held at December 31, 1996 by the Named Officers:     
     
  AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR END OPTION
                                  VALUES     
 
<TABLE>   
<CAPTION>
                                                                  NUMBER OF
                                                                 SECURITIES             VALUE OF
                                                                 UNDERLYING           UNEXERCISED
                                                                 UNEXERCISED          IN-THE-MONEY
                                                                 OPTIONS AT            OPTIONS AT
                                                             FISCAL YEAR END (#) FISCAL YEAR END ($)(1)
                                                             ------------------- ----------------------
                          SHARES ACQUIRED                       EXERCISABLE/          EXERCISABLE/
          NAME            ON EXERCISE (#) VALUE REALIZED ($)    UNEXERCISABLE        UNEXERCISABLE
          ----            --------------- ------------------ ------------------- ----------------------
<S>                       <C>             <C>                <C>                 <C>
John S. Murchison, III..        --               --               0/106,104           $0/1,049,369
Michael A. Ervin........        --               --                0/53,052              0/524,684
Thomas L. Lee...........        --               --                0/23,210              0/229,547
</TABLE>    
- --------
   
(1) Represents the value of immediately exercisable EAP Options to be issued
    in connection with the closing of the Offering, at an assumed Offering
    price of $12.00 per share less the weighted average exercise price of the
    EAP Options.     
       
DIRECTOR COMPENSATION
   
  In March 1996, the Company instituted a program under which its non-
employee, non-affiliated directors are paid an annual retainer of $15,000, a
fee of $1,000 for each board meeting attended and a fee of $800 for each
committee meeting attended. The Company permits directors to defer all or part
of their compensation, if they so choose. Under these arrangements, the only
directors who are eligible to receive compensation are Messrs. Ricks and
MacLachlan. Mr. Ricks' compensation is paid to The University of Texas
Investment Management Company.     
 
EQUITY APPRECIATION PLAN
 
  In January 1995, the Company established the DTM Corporation Equity
Appreciation Plan. An aggregate of 10,000,000 phantom stock units were created
thereunder, and 1,000,000 of such units were allocated for the issuance of a
like number of phantom stock appreciation rights ("SARs") to employees of the
Company. The value of each phantom stock unit as of any date is equal to the
fraction obtained by dividing the total value of the Company (as determined
under the Equity Appreciation Plan) as of such date by 10,000,000. The total
value of DTM as of any date is deemed for purposes of the Equity Appreciation
Plan to be equal to a valuation of DTM, using a methodology approved by the
Board of Directors, as of the end of the immediately preceding fiscal year
made by an independent third party, subject to approval of the Board of
Directors.
   
  Of the 1,000,000 authorized SARs, 999,000 have been granted to eligible
employees and are outstanding as of the date of this Prospectus. All employees
of the Company participated in the Equity Appreciation Plan as of February 15,
1997. Each granted SAR represents the right to receive the dollar amount of
any appreciation in the value of one phantom stock unit between the date on
which the SAR is granted and the date on which it is exercised. While the SARs
are not exercisable until the occurrence of a "Change of Control" (as defined
in the Equity Appreciation Plan), upon the date of execution of the
underwriting agreement relating to the Offering (the "Conversion Date"), all
SARs then outstanding will convert into immediately exercisable options to
acquire Common Stock ("EAP Options"). The 999,000 SARs outstanding as of the
date of this Prospectus will convert into EAP Options to acquire an aggregate
of an estimated 662,486 shares of Common Stock. Options to purchase 538,146
shares of Common Stock (those options arising from the conversion of SARs
awarded in 1995) will be exercisable for $2.11 per share. The remaining
options to purchase 19,894 and 104,446 shares of Common Stock (those options
arising from the conversion of SARs awarded in 1996 and 1997) will be
exercisable for $13.90 and $12.82, respectively, per share. Each EAP Option
will continue to be exercisable through the tenth anniversary of the grant of
the SAR from which it was converted. Each holder of an EAP Option may exercise
it in full or in part. EAP Options are only exercisable for cash.     
 
                                      37
<PAGE>
 
   
  The conversion of SARs into immediately exercisable EAP Options, certain of
which will have exercise prices substantially less than the market price per
share of Common Stock on the Conversion Date (such market price being deemed
for such purposes to be equal to the Offering price) will result in the
recognition by the Company of a non-recurring, non-cash compensation expense
measured by the difference between the aggregate market value of the shares of
Common Stock subject to such options and the aggregate exercise price of such
options (compensation expense of approximately $5.3 million if the Offering
price is $12.00 per share). Such compensation expense is expected to
materially adversely affect operating results in the quarter and year in which
it becomes probable that the closing of the Offering will occur.     
   
  In March 1996, the Board of Directors capped at 1,000,000 the aggregate
number of SARs that can be granted under the Equity Appreciation Plan.     
 
STOCK OPTION PLAN
   
  In January 1996, the Company adopted the DTM Corporation Stock Option Plan
(the "Option Plan"), which authorizes the Compensation Committee of the Board
of Directors (the "Compensation Committee") to grant options to key management
employees to acquire up to 477,750 shares of Common Stock, at option prices of
not less than 100 percent of the fair market value of the Common Stock on the
date of grant. No options have been granted under the Option Plan.     
 
  Under the Option Plan, options are granted upon terms and conditions
established by the Compensation Committee, which terms and conditions include
the option price, the term of the option (which in no event shall exceed 10
years), the status of the option as a non-incentive stock option, or an
incentive or other statutory stock option, the date on which the option will
first become exercisable, and the type of consideration that may be used to
exercise an option, which may include existing shares of the Common Stock.
Options granted under the Option Plan will vest in three separate installments
with 35 percent of the options granted becoming exercisable on the first
anniversary date of the option grant, 35 percent becoming exercisable on the
second anniversary date and 30 percent becoming exercisable on the third
anniversary date. The Compensation Committee also has the right to determine
the length of time, if any, following the termination of an optionee's
employment by reason of death, disability or retirement during which an
outstanding option may remain exercisable, except that in no event may an
option remain exercisable for more than 10 years after the date of grant. The
Option Plan also authorizes the Compensation Committee to grant stock
appreciation rights, pursuant to which stock options may be surrendered to the
Company in exchange for consideration equal to the difference between the
option price and the fair market value of the Common Stock on the date of
surrender.
 
  All grants of options will be subject to agreements between the Company and
the optionee, which will contain the terms and conditions of the option and
will bind the optionee to any temporary restrictions on sales of Common Stock
required by the underwriters in any public offering of the Common Stock.
 
MANAGEMENT INCENTIVE PLAN
 
  In January 1996, the Company adopted the DTM Corporation Management
Incentive Plan (the "MIP Plan"), which provides for the grant of incentive
compensation to key management employees who have the potential to positively
influence the performance of the Company, as a reward for levels of
performance above the ordinary performance standards compensated by base
salary.
   
  Under the MIP Plan, each participant is assigned a "cash bonus target" of 20
to 50 percent of base salary, depending upon the management level of the
particular individual. Each year, the Compensation Committee creates corporate
performance measures, establishes targets for each such measure and, if it so
chooses, assigns different weights to each measure. The MIP Plan is structured
so that if each measure is met precisely, the MIP Plan establishes a bonus
equal to each individual's cash bonus target. If the performance measures are
exceeded, or if they are not met, a greater or lesser bonus is paid, depending
upon the extent to which actual performance varies from the performance target
and the weights given to the particular performance measures. Under the MIP
    
                                      38
<PAGE>
 
Plan, minimum thresholds are established that must be reached if any bonus is
to be paid. If the minimum thresholds are met or exceeded, the bonus payable
will be between 50 percent and 150 percent of the individual's cash bonus
target. The corporate performance measures that may be used by the Company in
any given year may include net income, pretax income, consolidated operating
income, operating income return on net capital employed, cash flow, working
capital, return on equity, return on assets and earnings per share. The
Compensation Committee and the Company's management have discretion to adjust
individual bonus payments up or down on a case-by-case basis.
   
  Prior to 1997, no amounts were payable under the MIP Plan. Targets for 1997
are based on net profit and free cash flow milestones. No payments are due to
be paid until early 1998, assuming threshold performance targets are met.     
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
   
  The Compensation Committee of the Board of Directors was formed in April
1990. During 1996, the members of the Compensation Committee were Messrs.
Larsen, Ricks and Tobler. The Compensation Committee oversees administration of
the Company's employee benefit plans and compensation policies.     
 
                              CERTAIN TRANSACTIONS
 
SHAREHOLDERS' AGREEMENT
 
  The Company and all of its existing shareholders are parties to a
shareholders' agreement (the "Shareholders' Agreement") that was originally
entered into in March 1988, and has been amended periodically since that time,
having been significantly amended and restated in late 1989 in connection with
BFGoodrich's initial involvement in the Company, and amended and restated again
in April 1996. Most of the provisions of the Shareholders' Agreement will
terminate as of the completion of the Offering. The following summary of the
Shareholders' Agreement is qualified in its entirety by reference to the full
Shareholders' Agreement, which is filed as Exhibit 10.9 to the Registration
Statement of which this Prospectus is a part.
   
  Under the Shareholders' Agreement, the existing DTM shareholders have certain
rights of participation in public offerings by the Company of Common Stock,
sometimes referred to as "piggyback" registration rights. These rights continue
for the benefit of the parties to that agreement who are not eligible to sell
shares of Common Stock absent registration under the Securities Act of 1933, as
amended (the "Securities Act"). However, if the underwriter of such an offering
determines that not all shares tendered for a public offering can be sold, then
the shares tendered by each shareholder will be reduced proportionately.
Participating shareholders must enter into underwriting agreements, make
representations and share in registration and filing fees. DTM is obligated to
pay all other costs associated with a public offering and must indemnify
shareholders for certain liabilities that could arise in the context of a
registered public offering of Common Stock. Shareholders have a reciprocal
obligation of indemnification for information supplied by them. Shareholders'
registration rights terminate when two conditions are met: (a) there is a
public market for the Common Stock; and (b) their Common Stock can be sold
pursuant to Rule 144 under the Securities Act.     
 
  Two shareholders expressed interest in exercising their registration rights
in connection with the Common Stock offered at the time of the Offering. Their
shares have been included to the extent described herein. See "Principal and
Selling Shareholders." Following the Offering described herein, it is expected
that only BFGoodrich will have ongoing registration rights.
 
  Under the Shareholders' Agreement, shares of Common Stock are subject to
restrictions on transfer until such time as there is a public market for the
Common Stock. In addition, the Shareholders' Agreement contains a methodology
whereby the Common Stock can be valued in advance of the existence of a public
market for purposes of exercises of rights of first refusal and for certain
other purposes thereunder. The Shareholders' Agreement terminates
automatically, except for the obligations related to compliance with securities
laws on transfer and certain registration rights, when there is a public market
for the Common Stock, as defined in the Shareholders' Agreement. The remaining
provisions of the Shareholders' Agreement may be terminated only by
shareholders holding 85 percent of the outstanding shares subject to that
agreement.
 
                                       39
<PAGE>
 
  In April 1996, the Shareholders' Agreement was substantially amended and
restated. Provisions that had been amended or superseded, or that had expired,
either by agreement or the passage of time were deleted and various amendments
were incorporated. A provision allowing certain minority shareholders to
initiate an initial public offering of the Common Stock was deleted, with
BFGoodrich agreeing to deletion of a corresponding provision allowing it to
purchase minority shares in lieu of a shareholder-initiated initial public
offering. Special provisions granting BFGoodrich certain representation rights
on the Board of Directors, and committees thereof, were deleted. The survival
of registration rights after an initial public offering of the Common Stock
was limited to those parties who were parties to the Shareholders' Agreement
at the time of the amendment and restatement in April 1996. Finally, certain
rights to include minority shares in a sale of outstanding Common Stock were
revised to terminate at the time of an initial public offering.
 
INDEMNIFICATION AND LIABILITY OF OFFICERS AND DIRECTORS
 
  The Company's directors and officers are granted certain indemnities by
virtue of the Articles of Incorporation and Bylaws of the Company. Under the
Articles of Incorporation, directors cannot be held liable to shareholders for
monetary damages except in the event of breach of the duty of loyalty, bad
faith, intentional misconduct or knowing violations of law and certain other
specified events. The Bylaws of DTM also contain provisions consistent with
Texas law providing for indemnification of directors, officers, employees and
agents acting on behalf of the Company. There is no pending litigation or
proceeding involving a director or officer of the Company as to which
indemnification is being sought. The Company is not aware of any pending or
threatened litigation that could result in claims for indemnification by any
director or officer.
 
  Individuals who serve as directors and executive officers of the Company are
included in the directors and officers insurance coverage of BFGoodrich, as
part of the insurance program that BFGoodrich maintains for its business units
and subsidiaries. DTM directors who are also employees of BFGoodrich are
entitled to indemnification pursuant to BFGoodrich's bylaws. Furthermore,
BFGoodrich's bylaws provide for discretionary indemnification for certain
other persons acting as officers or directors of its subsidiaries.
       
OUTSTANDING LINES OF CREDIT; FINANCING TRANSACTIONS
   
  The Company has outstanding lines of credit with NationsBank of Texas, N.A.
National City Bank of Cleveland, Ohio, and Texas Commerce Bank National
Association for $4.7 million, $3.5 million and $4.0 million, respectively. As
of February 15, 1997, the Company had outstanding $11.0 million under these
credit facilities. BFGoodrich has issued to NationsBank, National City Bank
and Texas Commerce Bank comfort letters on behalf of DTM in connection with
these credit lines. These lines of credit expire as of July 31, 1998. In
addition, BFGoodrich has provided to the Company an additional line of credit
in the amount of $4.0 million. As of February 15, 1997, the Company had
outstanding the full $4.0 million available under the BFGoodrich line of
credit. This line of credit bears interest at a rate equal to the prime
commercial lending rate of Citibank, N.A. The BFGoodrich line of credit
matures July 31, 1998 or, if earlier, at the time of completion of the
Offering of Common Stock described herein. The Company has committed to prepay
and terminate all of the borrowing facilities referred to above shortly
following completion of the Offering. The Company plans to replace them with a
stand-alone commercial borrowing facility that would be available to finance
its then current operations, including temporary cash shortages, or to meet
future, currently unforeseen cash needs. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations."     
       
CERTAIN ARRANGEMENTS WITH BFGOODRICH
 
  The Company is a party to a tax allocation agreement with BFGoodrich. This
agreement provides for DTM to receive credit from BFGoodrich equal to the tax
benefit related to the losses DTM creates, to the extent that those losses are
utilized in the consolidated federal income tax return of BFGoodrich. As a
result of the sale of shares of Common Stock in the Offering described herein,
the ownership of outstanding Common Stock by BFGoodrich will decrease to less
than 80 percent. In that event, BFGoodrich will not be able to include DTM's
income or loss in BFGoodrich's consolidated federal income tax return
effective as of the time the 80 percent threshold is no longer met and,
consequently, DTM would lose the potential future benefit of the tax
allocation
 
                                      40
<PAGE>
 
agreement between DTM and BFGoodrich. While DTM would be able to use loss
carryovers accrued during the time before the Company's taxes were
consolidated with those of BFGoodrich, these carryovers are subject to
significant annual limitations due to substantial changes in DTM's ownership.
 
  In addition, BFGoodrich currently provides tax administration services and
participation in a group program for various types of insurance on a regular
basis, along with certain treasury and legal assistance on a periodic basis.
These arrangements are provided either at no cost to the Company or on terms
that could be considered more favorable to the Company than those that would
be available to DTM in arms-length transactions with unrelated vendors,
principally because DTM is able to take advantage of cost efficiencies
experienced by BFGoodrich due to the size of its operations. The Company
expects that DTM will continue to participate in many of these arrangements
after the Offering, until such time as BFGoodrich no longer owns a significant
interest in the Company. However, DTM may be ineligible to take part in some
insurance programs and certain other arrangements once BFGoodrich no longer
owns a majority of the outstanding Common Stock. Either party has the option
to terminate any of such arrangements at any time. See "Risk Factors--Loss of
Tax Allocation Agreement and Other Benefits from BFGoodrich."
   
  As of December 31, 1996, the Company had payables outstanding to BFGoodrich
in the approximate amount of $614,000, relating to various transactions
involving income taxes, accrued interest, payroll taxes and certain insurance.
    
  In December 1992, BFGoodrich transferred to DTM the intellectual property
rights used in its business of developing and selling powdered materials for
SLS Systems, in exchange for Common Stock. In connection with that transfer,
BFGoodrich entered into a non-competition agreement with DTM, in which
BFGoodrich agreed not to compete with DTM in the development or manufacture of
materials for use in DTM's SLS Systems, or of selective laser sintering
systems themselves. This agreement will expire on the fifth anniversary of the
date that BFGoodrich no longer owns, directly or indirectly, more than 50
percent of DTM's voting stock.
 
CERTAIN MATTERS AFFECTING CORPORATE GOVERNANCE
   
  Mr. Ricks was elected to the Board of Directors pursuant to a license
agreement between the Company and The University of Texas, which agreement
grants The University of Texas the right to maintain one Director on the
Company's Board. The University of Texas, however, has agreed to the deletion
of that provision contemporaneously with the closing of the Offering. Until
the March 1996 annual meeting of the Company's shareholders, BFGoodrich had
the right, under the Shareholders' Agreement, to nominate directors
proportionate to its percentage ownership of outstanding Common Stock, subject
to the rights of The University of Texas to elect one director. Preceding the
1996 annual meeting of shareholders, BFGoodrich proposed the nomination of
Messrs. Larsen, Murchison, Ricks, Rolls and Tobler. Mr. MacLachlan was
selected as a director based on a search carried out by the Company's
management, at the request of the Board of Directors. Messrs. MacLachlan,
Murchison and Ricks are not employees of BFGoodrich and have no understandings
with BFGoodrich in connection with their nomination or service as directors of
the Company. Messrs. Larsen, Rolls and Tobler are BFGoodrich employees and
serve on the Board of Directors at the request of BFGoodrich but subject to
the duties and responsibilities of directors under Texas corporate law. Due to
the large percentage of shares of Common Stock held by BFGoodrich, BFGoodrich
may control the selection of a majority of the remaining directors for some
period into the future.     
 
ROYALTIES
 
  In return for the exclusive, worldwide license from The University of Texas
for use of the selective laser sintering process patent, the Company is
obligated to pay The University of Texas a royalty equal to four percent of
net sales of SLS Systems and certain powdered materials. From the Company's
first commercial sale of an SLS System through December 31, 1994, DTM had paid
The University of Texas $134,000 of royalties
 
                                      41
<PAGE>
 
   
attributable to sales of licensed products. This amount was less than required
under the License. Upon the application of certain credits due DTM by The
University of Texas, the parties agreed that the net balance due The
University of Texas from DTM as of December 31, 1994 was $403,000, which was
paid as agreed in eight quarterly payments, plus interest, commencing in
January 1995. Royalties on sales commencing January 1, 1995 are paid currently
in accordance with the terms of the License. Through December 31, 1996,
royalties to The University of Texas paid or accrued by the Company totaled
approximately $1.6 million. See "Business--Intellectual Property."     
 
                                      42
<PAGE>
 
                      PRINCIPAL AND SELLING SHAREHOLDERS
   
  The following table sets forth certain information regarding the beneficial
ownership of the Common Stock as of February 15, 1997 by (i) DTM Holdings,
Ltd. and Joseph J. Beaman (the "Selling Shareholders"), (ii) each other person
known to the Company to be the beneficial owner of more than five percent of
the outstanding Common Stock, (iii) each director of the Company, (iv) each of
the Named Officers and (v) all directors and executive officers of the Company
as a group. Except as otherwise indicated below, the Company believes that
each person listed below has sole voting and investment power with respect to
the shares owned, subject to applicable community property laws. The address
of each individual is in care of the Company, 1611 Headway Circle, Building 2,
Austin, Texas 78754.     
 
<TABLE>   
<CAPTION>
                                SHARES BENEFICIALLY            SHARES BENEFICIALLY
                                OWNED PRIOR TO THE              OWNED AFTER THE
                                    OFFERING(1)                   OFFERING(1)
NAME AND ADDRESS OF BENEFICIAL  ---------------------- SHARES  ----------------------
  OWNER OR IDENTITY OF GROUP      NUMBER    PERCENT    OFFERED   NUMBER    PERCENT
- ------------------------------  ----------- ---------- ------- ----------- ----------
<S>                             <C>         <C>        <C>     <C>         <C>
The BFGoodrich Company(2)..       3,965,746    91.56%     --    3,965,746    59.80%
 4020 Kinross Lakes Parkway
 Richfield, Ohio 44286-9368
DTM Holdings, Ltd.(3)......         257,128     5.94% 249,467       7,661        *
 c/o Bradley A. Fowler
 Financial Services Austin,
 Inc.
 707 Southwest Tower
 211 E. 7th Street
 Austin, TX 78701
Joseph J. Beaman...........          12,693        *    3,285       9,408        *
D. Lee Tobler(4)...........       3,965,746    91.56%     --    3,965,746    59.80%
John S. Murchison, III(5)..         106,104     2.39%     --      106,104     1.57%
Michael A. Ervin(5)........          53,052     1.21%     --       53,052        *
Uday Bellary(5)............          53,052     1.21%     --       53,052        *
Thomas L. Lee(5)...........          23,010        *      --       23,010        *
Marshall O. Larsen(4)......       3,965,746    91.56%     --    3,965,746    59.80%
Alexander MacLachlan.......             --        --      --          --        --
Thomas G. Ricks(6).........          27,300        *      --       27,300        *
Steven G. Rolls(4).........       3,965,746    91.56%     --    3,965,746    59.80%
All directors and executive
 officers as a group
 (9 persons)...............       4,228,264    92.59%     --    4,228,264    61.58%
</TABLE>    
- --------
 * Less than one percent.
   
(1) Beneficial ownership is determined in accordance with the rules of the
    Securities and Exchange Commission and generally includes voting or
    investment power with respect to securities. In accordance with such
    rules, EAP Options are assumed to be exercised to the extent held by the
    person whose beneficial ownership is shown.     
   
(2) BFGoodrich will beneficially own 3,710,446 shares, 55.95% of those
    outstanding (or 50.86% assuming the exercise of all EAP Options), after
    the Offering if the Underwriters' over-allotment option is exercised in
    full.     
(3) A Texas limited partnership of which Financial Services Austin, Inc. is
    the general partner and may be deemed the beneficial owner of such shares.
(4) Includes only shares owned by BFGoodrich, of which the director disclaims
    beneficial ownership.
   
(5) Represents for each individual shares of Common Stock issuable upon the
    exercise of EAP Options.     
(6) Includes only shares owned by The University of Texas System, of which Mr.
    Ricks disclaims beneficial ownership.
 
                                      43
<PAGE>
 
                         DESCRIPTION OF CAPITAL STOCK
   
  The authorized capital stock of the Company consists of 60,000,000 shares of
Common Stock, $.0002 par value per share, of which 4,331,247 shares were
issued and outstanding as of February 15, 1997, and 3,000,000 shares of
Preferred Stock, $.001 par value per share, none of which have been issued.
See "Capitalization."     
 
COMMON STOCK
 
  Holders of Common Stock are entitled to one vote per share on all matters to
be voted upon by the Company's shareholders. Holders of Common Stock are
entitled to receive ratably such dividends, if any, as may be declared by the
Board of Directors out of funds legally available therefor, after payment of
any dividends on any outstanding Preferred Stock. See "Dividend Policy." Upon
the liquidation, dissolution or winding up of the Company, the holders of
Common Stock are entitled to share ratably in all assets of the Company that
are legally available for distribution, after payment of all debts and other
liabilities and payment of any liquidation preference, if any, associated with
outstanding shares of Preferred Stock. Holders of Common Stock have no
preemptive, subscription, redemption or conversion rights. The outstanding
shares of Common Stock are, and the shares of Common Stock being sold by the
Company in the Offering will be, when issued and delivered, validly issued,
fully paid and nonassessable.
 
PREFERRED STOCK
 
  The Board of Directors is authorized, subject to any limitations prescribed
by the laws of the State of Texas, but without further action by the Company's
shareholders, to provide for the issuance of Preferred Stock in one or more
series, to establish from time to time the number of shares to be included in
each such series, to fix the designations, powers, preferences and rights of
the shares of each such series and any qualifications, limitations or
restrictions thereof, and to increase or decrease the number of shares of any
such series (but not below the number of shares of such series then
outstanding) without any further vote or action by the shareholders. The Board
of Directors may authorize and issue Preferred Stock with voting or conversion
rights that could adversely affect the voting power or other rights of the
holders of Common Stock. In addition, the issuance of Preferred Stock may have
the effect of delaying, deferring or preventing a change in control of the
Company. The Company has no current plan to issue any shares of Preferred
Stock.
 
CERTAIN PROVISIONS OF THE ARTICLES OF INCORPORATION
 
  The Company's Articles of Incorporation eliminate, to the fullest extent
permitted by law, the liability of its directors to the Company and its
shareholders for monetary damages for acts or omissions in the director's
capacity as such, except for liability (i) for breach of a duty of loyalty to
the Company or its shareholders, (ii) for acts or omissions not in good faith,
or which involve intentional misconduct or a knowing violation of law, (iii)
for receipt of improper benefits, (iv) where liability is expressly provided
for by statute or (v) for unlawful stock repurchases or dividend payments.
This provision is intended to afford the Company's directors the benefit of
the Texas Business Corporation Act, which provides that directors of Texas
corporations may be relieved of these types of liabilities. The Articles of
Incorporation further provide that directors receive the benefit of any future
amendment to Texas statutes that further limits the liability of a director.
 
TRANSFER AGENT AND REGISTRAR
 
  The Company has appointed Chase Mellon Shareholder Services L.L.C. as the
transfer agent and registrar for the Common Stock.
 
                                      44
<PAGE>
 
                        SHARES ELIGIBLE FOR FUTURE SALE
   
  Upon completion of the Offering, the Company will have 6,631,495 shares of
Common Stock outstanding. In addition to the shares of Common Stock that are
currently outstanding, options to acquire up to an estimated 662,486 shares of
Common Stock will be outstanding and immediately exercisable as of the
completion of the Offering under the Equity Appreciation Plan. See
"Management--Equity Appreciation Plan." In addition, a total of 477,750 shares
of Common Stock have been reserved for issuance under the Option Plan. The
Company has not granted any options under the Option Plan. See "Management--
Stock Option Plan." The Company plans to file Form S-8 registration statements
for the issuance of the shares issuable upon exercise of options granted under
such plans, with the result that shares so issued will be freely tradable by
the holders thereof, subject, in certain cases, to the lock-up agreements
described below. All of the 2,553,000 shares sold in the Offering (and any
shares sold upon exercise of the Underwriters' over-allotment option) will be
freely transferable by persons other than "affiliates" of the Company (as that
term is defined under the Securities Act) without restriction or further
registration under the Securities Act.     
 
  However, pursuant to the terms of the Underwriting Agreement, the
Underwriters have required current holders of the Common Stock to execute
agreements ("lock-up agreements") providing that they will not sell Common
Stock in the public markets for a period of 180 days from the date of this
Prospectus without the consent of the Representatives of the Underwriters. In
addition, all employees who hold options to acquire Common Stock under the
Equity Appreciation Plan have entered into similar agreements indicating that
they will not, without the consent of the Representatives of the Underwriters,
sell shares of Common Stock for a period of 180 days from the date of this
Prospectus.
   
  In general, under Rule 144 under the Securities Act ("Rule 144"), as
currently in effect, a person who has beneficially owned shares for at least
two years is entitled to sell, within any three-month period, a number of
"restricted" shares that does not exceed the greater of one percent of the
then outstanding shares of Common Stock (approximately 66,300 shares
immediately following the Offering) or the average weekly trading volume
during the four calendar weeks preceding such sale. Sales under Rule 144 also
are subject to certain manner of sale limitations, notice requirements and the
availability of current public information about the Company. Rule 144(k)
provides that a person who is not deemed an "affiliate" and who has
beneficially owned shares for at least three years is entitled to sell such
shares at any time under Rule 144 without regard to the limitations described
above. All of the shares outstanding prior to the Offering have met the three-
year holding period requirement under Rule 144 and will be eligible for sale
90 days after the Offering, subject to volume limitations applicable to sales
by affiliates. However, all existing shareholders have executed the lock-up
agreements described above.     
 
  The Company is unable to estimate the number of shares that may be sold in
the future by its existing shareholders or employees exercising stock options
or the effect, if any, that sales of shares by such shareholders or employees
will have on the market price of Common Stock prevailing from time to time.
Sales of substantial amounts of Common Stock by existing shareholders or
employees exercising options could adversely affect prevailing market prices.
 
                                      45
<PAGE>
 
                                 UNDERWRITING
 
  The Underwriters named below have severally agreed with the Company and the
Selling Shareholders, subject to the terms and conditions of the Underwriting
Agreement, to purchase the respective numbers of shares of Common Stock set
forth opposite their names below.
 
<TABLE>       
<CAPTION>
                                                                        NUMBER
      UNDERWRITER                                                      OF SHARES
      -----------                                                      ---------
      <S>                                                              <C>
      A.G. Edwards & Sons, Inc........................................
      Ladenburg Thalmann & Co. Inc....................................
                                                                       ---------
          Total....................................................... 2,553,000
                                                                       =========
</TABLE>    
 
  The Underwriting Agreement provides that the Underwriters are obligated to
purchase all of the shares of Common Stock, if any are purchased.
   
  The Company has been advised by A.G. Edwards & Sons, Inc. and Ladenburg
Thalmann & Co. Inc., the Representatives of the several Underwriters (the
"Representatives"), that the Underwriters propose to offer the Common Stock to
the public at the offering price set forth on the cover page of this
Prospectus and to certain dealers at such price less a concession not in
excess of $.    per share and that the Underwriters and such dealers may
reallow a discount of not in excess of $.    per share to other dealers. The
public offering price and the concession and discount to dealers may be
changed by the Representatives after the Offering.     
   
  BFGoodrich has granted the Underwriters an option, expiring at the close of
business on the 30th day subsequent to the date of the Underwriting Agreement,
to purchase up to 255,300 additional shares of Common Stock at the Offering
price, less the underwriting discount set forth on the cover page of this
Prospectus. The Underwriters may exercise such option solely to cover over-
allotments, if any, in the sale of the shares. To the extent the Underwriters
exercise such option, each of the Underwriters will have a firm commitment,
subject to certain conditions, to purchase approximately the same percentage
of the option shares as the number of shares to be purchased by it shown in
the table above bears to 2,553,000, and BFGoodrich will be obligated, pursuant
to the option, to sell such shares to the Underwriters.     
   
  The Company and the Selling Shareholders have agreed to indemnify the
Underwriters against certain liabilities, including liabilities under the
Securities Act. The liability of BFGoodrich under this indemnity is limited to
the amount of the proceeds received by the Company, plus any proceeds received
by BFGoodrich from the sale of shares under the over-allotment option. The
liability of the Selling Shareholders under this indemnity is limited to the
amount of their proceeds.     
 
  The Company and all of its existing shareholders and SAR holders have agreed
that they will not, directly or indirectly, offer, sell or otherwise dispose
of any shares of Common Stock, other than the shares offered pursuant to this
Prospectus, for a period of 180 days from the date of this Prospectus without
the prior written consent of each of the Representatives. See "Shares Eligible
for Future Sale."
 
  The Representatives have advised the Company that they do not intend to
confirm sales to any account over which they exercise discretionary authority.
 
  Prior to the Offering, there has been no public market for the Common Stock.
The Offering price for the Common Stock was determined by negotiation among
the Company and the Representatives. Among the factors considered in
determining the Offering price was the history of and the prospects for the
Company and the industry in which it operates, the past and present operating
results of the Company and the trends of such results, the future prospects of
the Company, an assessment of the Company's management, the general condition
for the securities markets at the time of the Offering and the prices for
similar securities of comparable companies.
 
                                      46
<PAGE>
 
                                 LEGAL MATTERS
 
  The legality of the issuance of the shares of Common Stock offered hereby
under Texas law and certain other legal matters will be passed upon for the
Company by Vinson & Elkins L.L.P., Dallas, Texas. Certain legal matters will
be passed upon for the Underwriters by Gardere & Wynne, L.L.P., Dallas, Texas.
 
                                    EXPERTS
   
  The consolidated financial statements of DTM Corporation at December 31,
1995 and 1996, and for each of the three years in the period ended December
31, 1996, appearing in this Prospectus and the Registration Statement have
been audited by Ernst & Young LLP, independent auditors, as set forth in their
report thereon appearing elsewhere herein, and are included in reliance upon
such report given upon the authority of such firm as experts in accounting and
auditing.     
 
                            ADDITIONAL INFORMATION
 
  A Registration Statement on Form S-1 including amendments thereto relating
to the Common Stock offered hereby has been filed by the Company with the
Securities and Exchange Commission, Washington, D.C. This Prospectus does not
contain all of the information set forth in the Registration Statement and the
exhibits and schedules thereto. Statements contained in this Prospectus as to
the contents of any contract or other document referred to are not necessarily
complete and in each instance reference is made to the copy of such contract
or other document filed as an exhibit to the Registration Statement, each such
statement being qualified in all respects by such reference. For further
information with respect to the Company and the Common Stock offered hereby,
reference is made to such Registration Statement, exhibits and schedules. A
copy of the Registration Statement may be inspected by anyone without charge
at the Securities and Exchange Commission's principal office located at 450
Fifth Street, N.W., Room 1024, Washington, D.C. 20549, the New York Regional
Office located at 7 World Trade Center, Suite 1300, New York, New York 10048,
and the Chicago Regional Office located at Northwestern Atrium Center, 500
West Madison Street, Chicago, Illinois 60661-2511 and copies of all or any
part thereof may be obtained from the Public Reference Section of the
Securities and Exchange Commission upon the payment of certain fees prescribed
by the Securities and Exchange Commission. The Registration Statement may also
be obtained from the Web site that the Commission maintains at www.sec.gov.
 
  The Company intends to furnish its shareholders with annual reports
containing audited financial statements certified by an independent public
accounting firm and quarterly reports for each of the first three quarters of
each fiscal year containing unaudited financial information.
 
                                      47
<PAGE>
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>   
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
AUDITED FINANCIAL STATEMENTS
Report of Independent Auditors........................................... F-2
Consolidated Balance Sheets as of December 31, 1995 and 1996............. F-3
Consolidated Statements of Operations for the years ended December 31,
 1994, 1995 and 1996..................................................... F-4
Consolidated Statements of Shareholders' Equity (Deficit) for the years
 ended December 31, 1994, 1995 and 1996.................................. F-5
Consolidated Statements of Cash Flows for the years ended December 31,
 1994, 1995 and 1996..................................................... F-6
Notes to Consolidated Financial Statements............................... F-7
</TABLE>    
       
                                      F-1
<PAGE>
 
                        REPORT OF INDEPENDENT AUDITORS
 
Board of Directors and Shareholders
DTM Corporation
   
  We have audited the consolidated balance sheets of DTM Corporation (a
majority-owned subsidiary of The B.F.Goodrich Company) and its subsidiary as
of December 31, 1995 and 1996, and the related consolidated statements of
operations, shareholders' equity (deficit) and cash flows for each of the
three years in the period ended December 31, 1996. These financial statements
are the responsibility of the Company's management. Our responsibility is to
express an opinion on these financial statements based on our audits.     
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audits to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
   
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of DTM
Corporation and its subsidiary at December 31, 1995 and 1996, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1996, in conformity with
generally accepted accounting principles.     
 
                                            Ernst &Young LLP
 
Austin, Texas
   
February 13, 1997     
     
      
                                      F-2
<PAGE>
 
                                DTM CORPORATION
 
                          CONSOLIDATED BALANCE SHEETS
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)
 
<TABLE>   
<CAPTION>
                                                               DECEMBER 31,
                                                             -----------------
                                                               1995     1996
                                                             --------  -------
<S>                                                          <C>       <C>
ASSETS
Current assets:
  Cash.....................................................  $    756  $   329
  Accounts receivable, net of allowance for doubtful
   accounts of $263 in 1995 and $640 in 1996...............     2,941    7,205
  Due from BFGoodrich......................................       381      --
  Inventory................................................     2,143    4,835
  Prepaid expenses and other...............................       372      595
                                                             --------  -------
Total current assets.......................................     6,593   12,964
Furniture and equipment, net...............................     2,647    3,057
Capitalized software development costs, net of accumulated
 amortization of $388 in 1995 and $292 in 1996.............       843      848
Patent and license fees, net of accumulated amortization of
 $470 in 1995 and $766 in 1996.............................       406      791
Other noncurrent assets....................................       150      237
                                                             --------  -------
Total assets...............................................  $ 10,639  $17,897
                                                             ========  =======
LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Accounts payable.........................................  $  2,502  $ 5,845
  Due to BFGoodrich........................................       --       614
  Deferred revenues........................................       905    1,474
  Accrued expenses and other liabilities...................     2,074    2,640
  Short-term borrowings....................................       676      769
                                                             --------  -------
Total current liabilities..................................     6,157   11,342
Borrowings under line of credit from BFGoodrich............       200    4,000
Notes payable to banks.....................................     8,200   11,040
Commitments and contingencies (Note 10)....................
Shareholders' equity (deficit):
  Preferred stock, $.001 par value, 3,000,000 shares
   authorized, no shares issued and outstanding............       --       --
  Common stock, $.0002 par value, 60,000,000 shares
   authorized;
   4,331,247 shares issued and outstanding.................         1        1
  Additional paid-in capital...............................    28,019   28,019
  Accumulated deficit......................................   (31,980) (36,469)
  Cumulative translation adjustment........................        42      (36)
                                                             --------  -------
Total shareholders' equity (deficit).......................    (3,918)  (8,485)
                                                             --------  -------
Total liabilities and shareholders' equity (deficit).......  $ 10,639  $17,897
                                                             ========  =======
</TABLE>    
 
                            See accompanying notes.
 
                                      F-3
<PAGE>
 
                                DTM CORPORATION
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                      
                   (IN THOUSANDS, EXCEPT SHARE AMOUNTS)     
 
<TABLE>   
<CAPTION>
                                                  YEAR ENDED DECEMBER 31,
                                                 ----------------------------
                                                  1994     1995       1996
                                                 -------  -------  ----------
<S>                                              <C>      <C>      <C>
Revenue:
  Products...................................... $ 8,127  $12,632  $   22,070
  Service and support...........................   1,112    1,579       2,309
                                                 -------  -------  ----------
                                                   9,239   14,211      24,379
Cost of sales:
  Products......................................   5,370    8,803      13,021
  Service and support...........................     511      873       1,424
                                                 -------  -------  ----------
                                                   5,881    9,676      14,445
                                                 -------  -------  ----------
Gross profit....................................   3,358    4,535       9,934
Operating expenses:
  Selling, general and administrative...........   5,249    6,620       9,980
  Research and development......................   3,840    3,521       4,292
                                                 -------  -------  ----------
                                                   9,089   10,141      14,272
                                                 -------  -------  ----------
Operating loss..................................  (5,731)  (5,606)     (4,338)
Other income (expense):
  Interest expense, net.........................    (178)    (530)     (1,066)
  Cost of discontinued registration.............     --       --         (752)
                                                 -------  -------  ----------
                                                    (178)    (530)     (1,818)
                                                 -------  -------  ----------
Loss before income tax benefit allocated from
 BFGoodrich.....................................  (5,909)  (6,136)     (6,156)
Income tax benefit allocated from BFGoodrich....   1,825    2,138       1,667
                                                 -------  -------  ----------
Net loss........................................ $(4,084) $(3,998) $   (4,489)
                                                 =======  =======  ==========
Pro forma, giving effect to stand-alone taxa-
 tion:
  Net loss......................................                   $   (6,156)
                                                                   ==========
  Net loss per share............................                   $    (1.29)
                                                                   ==========
  Number of shares used.........................                    4,774,718
                                                                   ==========
</TABLE>    
 
 
                            See accompanying notes.
 
                                      F-4
<PAGE>
 
                                DTM CORPORATION
 
           CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT)
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)
 
<TABLE>   
<CAPTION>
                                          ADDITIONAL             CUMULATIVE
                                   COMMON  PAID-IN   ACCUMULATED TRANSLATION
                          SHARES   STOCK   CAPITAL     DEFICIT   ADJUSTMENT   TOTAL
                         --------- ------ ---------- ----------- ----------- -------
<S>                      <C>       <C>    <C>        <C>         <C>         <C>
Balance at January 1,
 1994................... 4,331,247  $ 1    $28,019    $(23,898)     $(44)    $ 4,078
  Net loss..............       --   --         --       (4,084)      --       (4,084)
  Translation adjust-
   ment.................       --   --         --          --         50          50
                         ---------  ---    -------    --------      ----     -------
Balance at December 31,
 1994................... 4,331,247    1     28,019     (27,982)        6          44
  Net loss..............       --   --         --       (3,998)      --       (3,998)
  Translation adjust-
   ment.................       --   --         --          --         36          36
                         ---------  ---    -------    --------      ----     -------
Balance at December 31,
 1995................... 4,331,247    1     28,019     (31,980)       42      (3,918)
  Net loss..............       --   --         --       (4,489)      --       (4,489)
  Translation adjust-
   ment.................       --   --         --          --        (78)        (78)
                         ---------  ---    -------    --------      ----     -------
Balance at December 31,
 1996................... 4,331,247  $ 1    $28,019    $(36,469)     $(36)    $(8,485)
                         =========  ===    =======    ========      ====     =======
</TABLE>    
 
 
                            See accompanying notes.
 
                                      F-5
<PAGE>
 
                                DTM CORPORATION
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>   
<CAPTION>
                                                    YEAR ENDED DECEMBER 31,
                                                    -------------------------
                                                     1994     1995     1996
                                                    -------  -------  -------
<S>                                                 <C>      <C>      <C>
OPERATING ACTIVITIES
Net loss........................................... $(4,084) $(3,998) $(4,489)
Adjustments to reconcile net loss to net cash used
 in operating activities:
  Depreciation and amortization....................   2,292    2,487    2,170
  Loss on disposal of equipment....................      34       32      --
  Changes in assets and liabilities used in
   operating activities:
    Accounts receivable............................     854   (1,314)  (4,264)
    Inventory......................................    (182)     157   (2,692)
    Due to/from BFGoodrich.........................     326   (1,064)     995
    Prepaid expenses and other assets..............      19      (90)    (310)
    Accounts payable...............................    (302)   1,469    3,343
    Deferred revenues..............................     (64)     103      569
    Accrued expenses and other liabilities.........    (656)     654      566
                                                    -------  -------  -------
Net cash used in operating activities..............  (1,763)  (1,564)  (4,112)
INVESTING ACTIVITIES
Purchases of furniture and equipment...............    (757)  (1,674)  (1,898)
Capitalized software development costs.............    (325)    (440)    (374)
Patent and license expenditures....................    (362)    (247)    (698)
                                                    -------  -------  -------
Net cash used in investing activities..............  (1,444)  (2,361)  (2,970)
FINANCING ACTIVITIES
Proceeds from notes payable........................   1,600    3,600      --
Proceeds from short-term borrowings................     --     2,681    3,448
Repayments of short-term borrowings ...............     --    (2,005)  (3,355)
Draws on line of credit from financial
 institutions......................................     --       --     2,840
Draws on line of credit from BFGoodrich............     --       200    3,800
                                                    -------  -------  -------
Net cash provided by financing activities..........   1,600    4,476    6,733
Effect of foreign exchange rate changes on cash....      50       36      (78)
                                                    -------  -------  -------
Net increase (decrease) in cash....................  (1,557)     587     (427)
Cash at beginning of year..........................   1,726      169      756
                                                    -------  -------  -------
Cash at end of year................................ $   169  $   756  $   329
                                                    =======  =======  =======
</TABLE>    
 
                            See accompanying notes.
 
                                      F-6
<PAGE>
 
                                DTM CORPORATION
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                               
                            DECEMBER 31, 1996     
 
1. ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES
 
 Organization
   
  DTM Corporation ("DTM" or the "Company") was formed in November 1987.
Through the proprietary and patented selective laser sintering process, the
Company is engaged in the development, design, manufacture, marketing and
support of rapid prototyping and rapid tooling systems. This technology,
exclusively licensed to DTM by The University of Texas, enables the
fabrication of three-dimensional solid models, prototypes or tool inserts
directly from three-dimensional computer aided design ("CAD") data. The
Company's products, related materials and maintenance and support services are
available to the worldwide, rapid prototyping market. The financial statements
include the accounts of DTM GmbH, a wholly-owned German subsidiary. All
significant intercompany accounts and transactions have been eliminated.     
   
  At December 31, 1996, DTM was approximately 92 percent owned by The
B.F.Goodrich Company ("BFGoodrich"). DTM has continued to incur operating
losses and cash flow deficiencies. As a result, DTM is substantially reliant
upon BFGoodrich for capital funding or other financial assistance to enable
DTM to meet its financial obligations. DTM has been advised by management of
BFGoodrich that it is BFGoodrich's current intention to assure that DTM
secures financial resources on an as-needed basis to meet its financial
obligations, until the successful completion of an initial public offering
("IPO") of the Company's common stock or the Company otherwise develops
financial resources to meet its current financial obligations.     
   
  BFGoodrich provides DTM with tax administration services, participation in a
group program for various types of insurance and certain other assistance,
including legal services. These arrangements are provided either at no cost to
the Company or on terms that could be considered more favorable to the Company
than those that would be available to DTM in arms-length transactions. The
cost of these services is not reflected in the accompanying financial
statements as estimates of these costs are insignificant to the results of
operations of each period presented.     
 
 Use of Estimates
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.
 
 Inventory
 
  Inventories are carried at the lower of cost or market, with cost determined
using the first-in, first-out (FIFO)
method.
 
 Furniture and Equipment
 
  Furniture and equipment is carried at cost less accumulated depreciation.
Depreciation expense is calculated on the straight-line method over the useful
life of each asset, which lives range from three to five years. Leasehold
improvements are amortized on the straight-line method over the life of the
related lease or the useful life of the respective asset, whichever is
shorter.
 
 Capitalized Software Development Costs
 
  The Company's principal products include a software component. Costs
incurred in the development of software, once technological feasibility has
been established but prior to general release to customers, are capitalized.
Technological feasibility is established when a product design and working
model of the software product have been completed and when the completeness of
the working model and its consistency with the
 
                                      F-7
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
 
1. ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
   
product design have been confirmed by testing. Amortization is provided on a
product by product basis at the greater of amortization based on the estimated
revenues of the products or the straight-line amortization over their
estimated economic lives of not more than three years. DTM capitalized
software development costs of $325,000 in 1994, $440,000 in 1995 and $374,000
in 1996. Amortization of capitalized software development costs totaled
$537,000 in 1994, $561,000 in 1995 and $369,000 in 1996. Amortization is
included in cost of product sales in the consolidated statements of
operations.     
 
 Patent and License Fees
   
  Patent and license fees represent the costs associated with filing and
maintaining patent applications and obtaining, maintaining and defending
rights under patents under which DTM operates. DTM capitalized patent and
license fees of $362,000 in 1994, $247,000 in 1995 and $698,000 in 1996. These
fees are amortized for accounting purposes over a five-year estimated economic
useful life utilizing the straight-line method and are included in selling,
general and administrative expense.     
 
 Translation of Foreign Subsidiary Financial Statements
 
  The financial statements of DTM GmbH (a wholly-owned subsidiary located in
Germany) are translated to U.S. dollars substantially as follows: all assets
and liabilities at year-end exchange rates; sales and expenses at average
exchange rates; and shareholders' equity at historical exchange rates. Gains
and losses from translating the financial statements of DTM GmbH are recorded
directly in shareholders' equity.
 
 Recognition of Revenue
   
  Revenues from the sale of SLS systems are recognized when title has
transferred to the customer, when the Company's remaining obligations are
insignificant and when collectibility of the related receivable is probable,
which is generally upon shipment. The Company defers from three to six percent
of the revenues, excluding certain accessories, from each SLS system sale for
warranty service. This deferred amount represents the Company's estimate of
the cost of providing such warranty service and is recognized ratably as
service and support revenue over the 12-month warranty period.     
 
  Upon expiration of the 12-month warranty period discussed above, the Company
offers for sale to its customers an annual maintenance contract, the revenues
from which are recognized ratably as service and support revenue over the
related support period.
 
 Pro Forma Net Loss Per Share
   
  Pro forma net loss per share for the year ended December 31, 1996 was
calculated on a stand-alone basis without allocation of the income tax benefit
from BFGoodrich using the weighted average number of common shares outstanding
plus the number of shares under options (certain of which will have exercise
prices substantially less than the Offering price) that will be outstanding
under the Equity Appreciation Plan (see Note 11) upon completion of an initial
public offering of the Company's common stock (see Note 15). In addition, an
effective 1.365-for-1 stock split, effected by the Company as a series of
recapitalizations completed in February 1997, has been retroactively applied
to all share and per share amounts. Historical per share amounts are not
presented because DTM is a majority-owned subsidiary of BFGoodrich.     
 
 Concentration of Credit Risk
   
  The Company sells its products and services to companies in diversified
industries. Credit is extended based on an evaluation of each customer's
financial condition, generally without requiring collateral. The Company
monitors its exposure to credit losses and maintains allowances for potential
losses.     
 
                                      F-8
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                             DECEMBER 31, 1996     
 
1. ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
 
 Dependence on Third-Party Suppliers
 
  The Company subcontracts for the manufacture of product sub-assemblies from
single-source, third-party suppliers. In addition, the Company has adopted a
"just-in-time" inventory system for product sub-assemblies and relies on
suppliers to provide components on a timely basis.
 
 Advertising Costs
   
  Advertising costs, which are expensed as incurred, were $346,000 in 1994,
$596,000 in 1995 and $757,000 in 1996.     
   
 Stock-Based Compensation     
   
  The Company accounts for stock-based employee compensation in accordance
with the provisions of APB Opinion No. 25, "Accounting for Stock Issued to
Employees," and related Interpretations.     
 
 Income Taxes
   
  The Company accounts for income taxes using Financial Accounting Standards
No. 109, "Accounting for Income Taxes." Under Statement 109, the liability
method is used in accounting for income taxes. Under this method, deferred tax
assets and liabilities are determined based on differences between financial
reporting and tax bases of assets and liabilities and are measured using the
enacted tax rates and laws that will be in effect when the differences are
expected to reverse.     
   
 Fair Value of Financial Instruments     
   
  The Company believes that the carrying amount of its financial instruments,
including debt, approximates fair value. Fair value is estimated based on
quoted market prices for similar instruments.     
       
2. ALLOWANCE FOR DOUBTFUL ACCOUNTS
 
  The Company maintains an allowance for doubtful accounts related to its
trade accounts receivable. The activity in this allowance account for the
years ended December 31, is as follows (in thousands):
 
<TABLE>     
<CAPTION>
                                     BALANCE AT CHARGES TO            BALANCE AT
                                     BEGINNING  COSTS AND               END OF
                                       PERIOD    EXPENSES  WRITE-OFFS   PERIOD
                                     ---------- ---------- ---------- ----------
   <S>                               <C>        <C>        <C>        <C>
   1994.............................    $150       $75        $21        $204
   1995.............................     204        60          1         263
   1996.............................     263       389         12         640
</TABLE>    
 
3. INVENTORY
 
   Inventory at December 31 consisted of the following (in thousands):
 
<TABLE>     
<CAPTION>
                                                                    1995   1996
                                                                   ------ ------
   <S>                                                             <C>    <C>
   Raw materials and purchased parts.............................. $1,423 $3,187
   Finished goods.................................................    720  1,648
                                                                   ------ ------
                                                                   $2,143 $4,835
                                                                   ====== ======
</TABLE>    
 
                                      F-9
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
 
4. FURNITURE AND EQUIPMENT
 
  Furniture and equipment at December 31 consisted of the following (in
thousands):
 
<TABLE>     
<CAPTION>
                                                                1995     1996
                                                               -------  -------
   <S>                                                         <C>      <C>
   Equipment.................................................. $ 5,977  $ 7,437
   Leasehold improvements.....................................   1,289    1,366
   Office furniture...........................................     347      356
                                                               -------  -------
                                                                 7,613    9,159
   Less accumulated depreciation and amortization.............  (4,966)  (6,102)
                                                               -------  -------
                                                               $ 2,647  $ 3,057
                                                               =======  =======
</TABLE>    
 
5. PATENT AND LICENSE AGREEMENTS
   
  On December 3, 1987, DTM entered into a patent license agreement with the
Board of Regents of The University of Texas System, whereby DTM is licensed to
make, have made and sell products utilizing the selective laser sintering
technology. In consideration of rights granted in the license agreement, DTM
issued 27,300 shares of its common stock to The University of Texas System.
       
  The agreement provides for royalty payments in the amount of four percent of
DTM's net sales for products covered by the license agreement (gross receipts
net of commissions, returns, freight, discounts and sales taxes). Royalty
expense, included in cost of sales, was $296,000 in 1994 and $424,000 in 1995
and $676,000 in 1996.     
          
  The Company evaluates the carrying values of patents and licenses to
determine if the facts and circumstances suggest that they may be impaired. If
this review indicates that patents and licenses will not be recoverable, as
determined based on the undiscounted cash flows of the entity over the
remaining amortization period, the carrying value of the patents and licenses
will be reduced accordingly.     
 
6. ACCRUED EXPENSES AND OTHER LIABILITIES
 
  Accrued expenses and other liabilities consist of the following as of
December 31 (in thousands):
 
<TABLE>     
<CAPTION>
                                                                   1995   1996
                                                                  ------ ------
   <S>                                                            <C>    <C>
   Royalties..................................................... $  491 $  360
   Payroll and related accruals..................................    431    525
   Other.........................................................  1,152  1,755
                                                                  ------ ------
                                                                  $2,074 $2,640
                                                                  ====== ======
</TABLE>    
   
7. FINANCING ARRANGEMENTS     
   
 Line of Credit with BFGoodrich     
   
  In November 1995, the Company entered into a line of credit agreement with
BFGoodrich under which the Company may borrow up to $2,000,000. During 1996,
the amount which the Company may borrow was increased to $4,000,000. The line
bears interest at the prime commercial lending rate of Citibank, N.A. (8.5
percent at December 31, 1996) and matures on the earlier of July 31, 1998 or
the date upon which the Company receives any proceeds from an IPO of the
Company's common stock. At December 31, 1995 and 1996, $200,000 and
$4,000,000, respectively, was outstanding under this agreement.     
 
                                     F-10
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
   
7. FINANCING ARRANGEMENTS (CONTINUED)     
   
 Short-Term Borrowings     
   
  At December 31, 1995 and 1996, DTM had a total of $676,000 and $769,000,
respectively, of short-term debt outstanding under the terms of a financing
arrangement with a leasing company. The weighted average interest rates on
outstanding short-term borrowings were 19 and 20 percent at December 31, 1995
and 1996, respectively. The weighted average interest rates during 1995 and
1996 were 18 and 21 percent, respectively. The debt is collateralized by
certain equipment and accounts receivable.     
          
 Notes Payable to Banks     
   
  At December 31, 1995, DTM had lines of credit with two banks under unsecured
promissory notes with available borrowings of $8,200,000. During 1996, DTM
obtained a third line of credit with a third bank under an unsecured
promissory note with available borrowings of $4,000,000. The combined
available borrowings for these lines of credit is $12,200,000, of which
$11,040,000 was outstanding as of December 31, 1996. BFGoodrich has provided
letters of comfort to each of these banks upon which the banks have relied in
providing credit to DTM. The notes mature on July 31, 1998 but the Company has
committed to pay them on the successful completion of an IPO. Interest on the
notes is payable monthly, determined on an advance-by-advance basis; and, at
the Company's election, may be based on each bank's then current prime rate,
CD rate or Eurodollar rate. Interest rates and outstanding balances on notes
payable at December 31, 1995 and 1996 were as follows:     
          
    
<TABLE>       
<CAPTION>
                  1995                                              1996
      --------------------------------                  -----------------------------------------------
      INTEREST            OUTSTANDING                   INTEREST                   OUTSTANDING
       RATES              BORROWINGS                     RATES                     BORROWINGS
      --------            -----------                   --------                   -----------
      <S>                 <C>                           <C>                        <C>
        6.5%              $4,700,000                      6.2%                     $ 4,700,000
        6.4%               2,800,000                      6.2%                       3,500,000
        8.5%                 700,000                     --                                --
                                  --                      6.2%                       2,840,000
                          ----------                                               -----------
                          $8,200,000                                               $11,040,000
                          ==========                                               ===========
</TABLE>    
   
Interest paid in connection with all of the above financing arrangements was
approximately $212,000 in 1994, $451,000 in 1995 and $1,079,000 in 1996
(approximately $153,000 of which was paid to BFGoodrich in 1996).     
   
8. COST OF DISCONTINUED REGISTRATION     
          
  During 1996, DTM attempted an IPO. However, due to market volatility and
other issues the IPO was postponed. The Company incurred approximately
$752,000 of legal, accounting and other professional services related to the
unsuccessful IPO which were expensed in the fourth quarter.     
   
9. INCOME TAXES     
   
  Since October 31, 1990, DTM has been included in the consolidated federal
tax return of BFGoodrich. Accordingly, for all periods since that date, the
Company has recorded the tax benefit allocated to it by BFGoodrich, which
credits the Company with a tax benefit approximating the benefit that
BFGoodrich derives from the consolidation of the Company. Such benefits are
generally paid to the Company by BFGoodrich on a current basis. Should
BFGoodrich's ownership interest fall below 80 percent, such benefits will no
longer be available to the Company. Based on the tax sharing agreement, if
BFGoodrich loses part of the tax benefit of any losses previously utilized or
has to report additional income as the result of a federal tax audit of DTM,
DTM will be required to reimburse BFGoodrich for any additional taxes paid.
    
                                     F-11
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
   
9. INCOME TAXES (CONTINUED)     
 
  DTM has net operating loss carryforwards totaling approximately $4,200,000
for federal income tax purposes, incurred from inception to October 31, 1990.
These carryforwards expire in the years 2002 to 2004 and, although available
to DTM, should DTM subsequently file a federal income tax return separate from
BFGoodrich, are subject to significant annual limitations due to substantial
changes in DTM's ownership.
   
  Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities of DTM for financial
reporting purposes and the amounts used for income tax purposes. Significant
components of the Company's deferred tax liabilities and assets as of December
31, 1995 and 1996 are as follows (in thousands):     
<TABLE>     
<CAPTION>
                                                              DECEMBER 31,
                                                             ----------------
                                                              1995     1996
                                                             -------  -------
   <S>                                                       <C>      <C>
   Deferred tax assets:
     Book over tax depreciation and amortization............ $    91  $   206
     Allowance for doubtful accounts........................      92      224
     Net operating loss carryforwards (for periods prior to
      October 31, 1990).....................................   1,470    1,470
     Other..................................................     115      106
                                                             -------  -------
   Total deferred tax assets................................   1,768    2,006
   Valuation allowance for deferred tax assets..............  (1,478)  (1,599)
                                                             -------  -------
                                                                 290      407
   Deferred tax liabilities:
     Deferred revenue.......................................     290      407
                                                             -------  -------
   Total deferred tax liabilities...........................     290      407
                                                             -------  -------
   Net deferred tax assets.................................. $   --   $   --
                                                             =======  =======
</TABLE>    
       
  A reconciliation of income tax benefit calculated at the statutory rate and
the provision for income tax benefit is as follows (in thousands):
 
<TABLE>   
<CAPTION>
                                                   YEARS ENDED DECEMBER 31,
                                                  ----------------------------
                                                    1994      1995      1996
                                                  --------  --------  --------
<S>                                               <C>       <C>       <C>
Income tax benefit at the federal statutory rate
 (34%)..........................................  $  2,009  $  2,086  $  2,093
Net operating loss not utilized by the Company..    (2,009)   (2,086)   (2,093)
Income tax benefit allocated from BFGoodrich....     1,825     2,138     1,667
                                                  --------  --------  --------
                                                  $  1,825  $  2,138  $  1,667
                                                  ========  ========  ========
</TABLE>    
   
  BFGoodrich files a consolidated federal income tax return which includes all
of its eligible subsidiaries, including the Company. If federal taxes were
computed assuming the Company filed a separate federal income tax return, no
benefit would be available to the Company. Accordingly, without the tax
benefit allocated from BFGoodrich, the Company's net loss for the year ended
December 31, 1996 would have been $6,156,000, or a loss of $1.29 per share,
and has been reflected in the pro forma amounts presented in the consolidated
statements of operations.     
   
  As a result of the Offering described herein, the ownership of outstanding
Common Stock by BFGoodrich will decrease to less than 80 percent. Effective as
of the date that such decrease occurs, BFGoodrich will no     
 
                                     F-12
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
   
9. INCOME TAXES (CONTINUED)     
   
longer be able to include DTM'S income or loss in BFGoodrich's consolidated
federal income tax return; consequently, DTM will lose the benefit of the tax
allocation agreement between DTM and BFGoodrich. BFGoodrich credits to the
Company the amount of any benefits realized by BFGoodrich as a result of the
inclusion of DTM'S losses and/or tax credits in BFGoodrich's consolidated
federal income tax return.     
       
   
10. COMMITMENTS AND CONTINGENCIES     
   
  DTM leases facilities and equipment under noncancelable operating leases,
expiring primarily in 1997. Total rent expense incurred under these leases was
approximately $246,000 in 1994, $252,000 in 1995 and $332,000 in 1996. Future
minimum payments under these leases are as follows (in thousands):     
 
<TABLE>   
         <S>                                                <C>
         1997.............................................. $281
         1998..............................................   22
         1999..............................................    7
</TABLE>    
   
  As of December 31, 1996, the Company had purchase commitments for inventory
totaling approximately $3,257,000.     
   
  In the ordinary course of business, the Company is subject to legal
proceedings and claims. In one such instance, DTM filed an action in the
United States District Court for the Eastern District of Wisconsin in October
1995 against three parties who are operating an SLS System. DTM alleges that
the defendants willfully infringed a DTM patent. In June 1996, DTM amended its
lawsuit to also assert that one of the defendants breached an oral settlement
agreement. The Company seeks injunctive relief, damages and attorneys fees.
The defendants have denied infringement and the existence of an oral
settlement agreement, and the defendants seek attorneys fees. The defendants
have also asserted the affirmative defenses of patent invalidity, implied
license, failure to mark patented articles, patent unenforceability and
invalidity of the oral settlement agreement. Discovery commenced in late 1995
and is ongoing. In a subsequent filing, one of the defendants also has
asserted claims against DTM and BFGoodrich for violation of state and federal
antitrust laws. That defendant seeks injunctive relief as well as damages and
attorneys fees. It is not possible at this time to predict the outcome of this
proceeding, although DTM and BFGoodrich have indicated that they believe that
the subsequent counter and cross claims for violation of antitrust laws are
without merit. However, a ruling unfavorable to the Company could have a
material adverse effect on the Company's business and financial performance.
    
       
   
11. EQUITY APPRECIATION PLAN     
       
   
  In January 1995, the Board of Directors approved the DTM Corporation Equity
Appreciation Plan (the "SAR Plan"), which created 10,000,000 Phantom Stock
Units. Ten percent of the Phantom Stock Units were allocated for the issuance
of a like number of Phantom Stock Appreciation Rights ("SARs") under the SAR
Plan to eligible employees. Each SAR granted to a Participant will vest and
become exercisable upon, but not prior to, a "Change in Control" of DTM. A
Change in Control of DTM shall be deemed to have occurred either: (1) when
common stock of DTM is issued to the public in an IPO; or (2) BFGoodrich is no
longer the owner of at least 50% of the outstanding common stock of DTM as a
result of an arms-length sale of all or a part of its interest in DTM to a
third party not affiliated or associated with BFGoodrich. If the Change of
Control results from an IPO, the SARs will immediately convert to fully vested
options to purchase common stock of the Company. If the Change in Control
occurs as the result of a sale of all or a part of BFGoodrich's interest in
DTM to a third party, the SARs will become immediately exercisable; and, a
Participant may exercise an SAR by providing written notice to DTM whereupon
the Participant will receive a cash amount equal to the     
 
                                     F-13
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
11. EQUITY APPRECIATION PLAN (CONTINUED)
   
appreciation in value of a Phantom Stock Unit from its value on the date the
SAR was granted to its value on the date it is exercised based upon the
applicable valuation of the Company. From and after, but not prior to, the
occurrence of a Change of Control, the SARs or stock options granted to the
Participants will become exercisable by the Participants for a period of 10
years from the date on which the SARs or stock options are granted. As of
December 31, 1995 and 1996, there were 997,000 and 841,500 SAR's outstanding,
respectively. The SAR's granted during 1995 were granted at a fair value of
$1.40 per SAR. During 1996, 30,000 SAR's were granted at a fair value of $9.22
per SAR. In addition, 185,500 SAR's were forfeited in 1996. Subsequent to
December 31, 1996, the Company granted an additional 157,500 SAR's at a fair
value of $8.50 per SAR.     
   
  Due to the terms and conditions of the SAR Plan, the SARs or stock options
outstanding thereunder will be accounted for by the Company as compensation
expense when it becomes probable that a Change in Control of DTM will occur.
The amount of compensation expense so recognized will be equal to the number
of SARs or stock options outstanding multiplied by the difference between the
exercise price of each SAR or stock option and the value of each SAR or stock
option at the date of the Change in Control. The exercise price and value at
the date of Change in Control of the SARs or stock options is determined by a
complex formula. However, upon the closing of an IPO, the Company will
recognize a non-cash charge (compensation) of approximately $5.3 million
(assuming an initial public offering price of $12.00 per share) to record the
appreciation in value of the SARs. The Company has reserved 800,000 shares of
Common Stock for future issuance under the SAR Plan.     
   
  The Company has elected to follow APB Opinion No. 25, "Accounting for Stock
Issued to Employees" and related Interpretations in accounting for its
employee incentive plan. The required additional disclosures under the
alternative fair value accounting provided for under FASB Statement No. 123,
"Accounting for Stock-Based Compensation," are not provided as no compensation
expense would be recognized on a pro forma basis.     
   
12. KEY EMPLOYEE STOCK OPTION PLAN     
   
  In January 1996, the Company's Board of Directors approved a DTM Corporation
Stock Option Plan (the "Option Plan"). Under the Option Plan, the Company set
aside 477,750 shares which may be awarded to key employees, as selected by
management and approved by the Compensation Committee of the Board of
Directors (the "Committee") through stock options, stock appreciation rights,
limited stock appreciation rights, restricted stock, performance shares, or
other awards as determined by the Committee. In the case of stock option
awards, the option price per share may not be less than the fair market value
of a share on the date the option is granted. Options granted under the Option
Plan will vest in three separate installments with 35 percent of the options
granted becoming exercisable on the first anniversary date of the option
grant, 35 percent becoming exercisable on the next succeeding anniversary date
and 30 percent becoming exercisable on the next succeeding anniversary date.
Options will be exercisable for a period of no more than 10 years from the
date of grant. The term of the Option Plan is five years unless terminated
earlier by the Board of Directors. There have been no grants made under the
Option Plan.     
   
13. MANAGEMENT INCENTIVE PLAN     
   
  In January 1996, the Company's Board of Directors approved a DTM Corporation
Management Incentive Plan (the "MIP Plan"). The MIP Plan provides for the
grant of incentive compensation to key management employees who have the
potential to positively influence the performance of the Company as a reward
for levels of performance above the ordinary performance standards compensated
by base salary. Under the MIP Plan, each participant is assigned a "cash bonus
target" of 20 to 50 percent of base salary and the compensation committee     
 
                                     F-14
<PAGE>
 
                                DTM CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
                               
                            DECEMBER 31, 1996     
13. MANAGEMENT INCENTIVE PLAN (CONTINUED)
   
of the Board of Directors creates personal and corporate performance targets,
as well as minimum thresholds. If the minimum thresholds are met, the bonus
payable will be between 50 to 150 percent of the participant's cash bonus
target. No expense was recognized in connection with the MIP Plan in 1996.
       
14. GEOGRAPHIC AND CUSTOMER INFORMATION     
 
  The Company and its subsidiary, located in Germany, operate in one industry
segment: the development, manufacturing and service of SLS systems and related
products. Operations outside of the United States consist principally of
sales, marketing and customer support. Transfers between geographic areas are
accounted for at amounts which are generally above cost and consistent with
the rules and regulations of governing tax
       
authorities. Such transfers are eliminated in the consolidated financial
statements. Identifiable assets are those assets that can be directly
associated with a particular geographic area. The following is a summary of
operations within each geographic area (in thousands):
 
<TABLE>   
<CAPTION>
                         NET REVENUES  TRANSFERS
                             FROM       BETWEEN    TOTAL
                         UNAFFILIATED  GEOGRAPHIC   NET     LOSS FROM            IDENTIFIABLE
                          CUSTOMERS      AREAS    REVENUES  OPERATIONS NET LOSS     ASSETS
                         ------------  ---------- --------  ---------- --------  ------------
<S>                      <C>           <C>        <C>       <C>        <C>       <C>
1994:
United States...........   $ 6,689(a)   $ 1,449   $ 8,138    $(5,743)  $(4,096)    $ 7,974
Germany.................     2,550          --      2,550         12        12       1,656
Eliminations............       --        (1,449)   (1,449)       --        --       (1,070)
                           -------      -------   -------    -------   -------     -------
                           $ 9,239      $   --    $ 9,239    $(5,731)  $(4,084)    $ 8,560
                           =======      =======   =======    =======   =======     =======
1995:
United States...........   $12,056(a)   $ 2,102   $14,158    $(5,431)  $(3,822)    $10,446
Germany.................     2,155          --      2,155       (175)     (176)      2,386
Eliminations............       --        (2,102)   (2,102)       --        --       (2,193)
                           -------      -------   -------    -------   -------     -------
                           $14,211      $   --    $14,211    $(5,606)  $(3,998)    $10,639
                           =======      =======   =======    =======   =======     =======
1996:
United States...........   $18,731(a)   $ 4,184   $22,915    $(4,691)  $(4,767)    $16,906
Germany.................     5,648          --      5,648        353       278       3,103
Eliminations............       --        (4,184)   (4,184)       --        --       (2,112)
                           -------      -------   -------    -------   -------     -------
                           $24,379      $   --    $24,379    $(4,338)  $(4,489)    $17,897
                           =======      =======   =======    =======   =======     =======
</TABLE>    
- --------
   
(a) The Company's United States net revenues from unaffiliated customers
    include export sales (principally to the Pacific Rim) of $666,000 in 1994,
    $2,611,000 in 1995 and $6,540,000 in 1996.     
   
  The Company's revenues are derived from sales to a wide range of
international customers. During 1995, $2,111,000, approximately 15% of total
revenues, were from sales to one customer.     
       
       
   
15. SUBSEQUENT EVENT     
       
   
  On February 13, 1997, the Company's Board of Directors authorized management
of the Company to proceed with an IPO of the Company's common stock. Although
the success of such a proposed offering cannot be certain, management is
proceeding with activities relating to this process.     
 
                                     F-15
<PAGE>
 
================================================================================
 
  NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY IN-
FORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY, THE SELLING SHARE-
HOLDERS OR ANY OF THE UNDERWRITERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OF-
FER TO SELL OR A SOLICITATION OF AN OFFER TO BUY THE SHARES BY ANYONE IN ANY
JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED, OR IN
WHICH THE PERSON MAKING THE OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO,
OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL CRE-
ATE ANY IMPLICATION THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY
TIME SUBSEQUENT TO ITS DATE.
 
                                ---------------
 
                               TABLE OF CONTENTS
 
<TABLE>   
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Prospectus Summary.......................................................   3
Risk Factors.............................................................   6
The Company..............................................................  11
Use of Proceeds..........................................................  11
Dividend Policy..........................................................  11
Capitalization...........................................................  12
Dilution.................................................................  13
Selected Consolidated Financial Data.....................................  14
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  15
Business.................................................................  22
Management...............................................................  35
Certain Transactions.....................................................  39
Principal and Selling Shareholders.......................................  43
Description of Capital Stock.............................................  44
Shares Eligible for Future Sale..........................................  45
Underwriting.............................................................  46
Legal Matters............................................................  47
Experts..................................................................  47
Additional Information...................................................  47
Index to Financial Statements............................................ F-1
</TABLE>    
 
                                ---------------
   
  UNTIL   , 1997 (25 DAYS AFTER COMMENCEMENT OF THIS OFFERING), ALL DEALERS
EFFECTING TRANSACTIONS IN THE COMMON STOCK, WHETHER OR NOT PARTICIPATING IN
THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS DELIVERY RE-
QUIREMENT IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS
WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR
SUBSCRIPTIONS.     

================================================================================

================================================================================
 
                                
                             2,553,000 SHARES     
 
                                DTM CORPORATION
 
                                 COMMON STOCK
 
                                ---------------
 
                                  PROSPECTUS
 
                                ---------------
 
                           A.G. EDWARDS & SONS, INC.
                         
                      LADENBURG THALMANN & CO. INC.     
                                 
                                     , 1997     
 
================================================================================
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The following table sets forth the various expenses payable by the
Registrant in connection with the sale and distribution of the securities
being registered, other than the underwriting discount. All of the amounts
shown are estimated except the Securities and Exchange Commission registration
fee, the Nasdaq National Market filing fee and the NASD filing fee.
 
<TABLE>    
      <S>                                                               <C>
      SEC Registration fee............................................. $12,558
      NASD filing fee..................................................   4,259
      Nasdaq National Market listing fee...............................  19,042
      Blue sky qualification fees and expenses.........................  10,000
      Printing and engraving expenses..................................      *
      Legal fees and expenses..........................................      *
      Accounting fees and expenses.....................................      *
      Transfer agent and registrar fees................................      *
      Miscellaneous....................................................      *
                                                                        -------
          Total........................................................ $    *
                                                                        =======
</TABLE>    
- --------
* To be completed by Amendment.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  The Registrant's Articles of Incorporation include provisions to permit the
Registrant to indemnify its directors and officers to the fullest extent
permitted by Texas law. Article 2.02-1 of the Texas Business Corporation Act
makes provision for the indemnification of officers and directors in terms
sufficiently broad as to include indemnification under certain circumstances
for liabilities (including reimbursement of expenses incurred) arising under
the Securities Act of 1933, as amended (the "Securities Act"). In addition, as
permitted by Article 2.02-1 of the Texas Business Corporation Act, the
Articles of Incorporation of the Registrant provide that a director of the
Registrant shall not be liable to the Registrant or its shareholders for
monetary damages for acts or omissions in the director's capacity as such,
except for liability (i) for breach of a duty of loyalty to the Registrant or
its shareholders, (ii) for acts or omissions not in good faith, or which
involve intentional misconduct or a knowing violation of law, (iii) for
receipt of improper benefits, (iv) where liability is expressly provided for
by statute or (v) for unlawful stock repurchases or dividend payments. The
Articles of Incorporation further provide that directors receive the benefit
of any future amendment to Texas statutes that further limits the liability of
a director.
 
  Individuals who serve as directors and executive officers of the Company are
included in the directors and officers insurance coverage of BFGoodrich, as
part of the insurance program that BFGoodrich maintains for its business units
and subsidiaries. Directors who are also employees of BFGoodrich are entitled
to indemnification pursuant to BFGoodrich's bylaws. Furthermore, BFGoodrich's
bylaws provide for discretionary indemnification for certain other persons
acting as officers or directors of its subsidiaries.
   
  The Underwriting Agreement filed as Exhibit 1.1 to this Registration
Statement provides for indemnification by the Underwriters of the Registrant
and the Selling Shareholders and its officers and directors for certain
liabilities arising under the Securities Act, or otherwise.     
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.
   
  During the Registrant's 1994 through 1996 fiscal years, and to date, the
Registrant has not sold or issued any unregistered securities pursuant to the
Securities Act.     
 
                                     II-1
<PAGE>
 
       
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
  (a) The following is a list of exhibits filed as a part of this Registration
Statement:
 
<TABLE>   
<CAPTION>
 EXHIBIT
 NUMBER                          DESCRIPTION OF DOCUMENT
 -------                         -----------------------
 <C>     <S>
  1.1*   -- Form of Underwriting Agreement.
  3.1+   -- Amended and Restated Articles of Incorporation of Registrant.
  3.2+   -- Amended and Restated Bylaws of Registrant.
  4.1*   -- Form of Stock Certificate of Registrant
  5.1#   -- Opinion of Vinson & Elkins L.L.P.
 10.1+   -- DTM Corporation Equity Appreciation Plan.
 10.2+   -- Form of Supplemental Phantom Stock Appreciation Rights Agreement.
 10.3*   -- DTM Corporation Management Incentive Plan, as Restated.
 10.4+   -- DTM Corporation Stock Option Plan.
 10.5+   -- Patent License Agreement between DTM Corporation and the Board of
            Regents, The University of Texas, effective as of December 3, 1987.
 10.6+   -- Supplement to Patent License Agreement between DTM Corporation and
            the Board of Regents, The University of Texas, dated March 20,
            1992.
 10.7*   -- Promissory Note to NationsBank of Texas, N.A.
 10.8*   -- Promissory Note to National City Bank.
 10.9*   -- Promissory Note to Texas Commerce Bank National Association.
 10.10*  -- Promissory Note to The B.F.Goodrich Company.
 10.11+  -- Amended and Restated Shareholders' Agreement.
 10.12+  -- Lease Agreement for Facilities in Austin, Texas.
 10.13+  -- Amendment to Patent License Agreement between DTM Corporation and
            the Board of Regents of The University of Texas, dated as of
            October 27, 1994.
 11.1*   -- Statement of Computation of Earnings Per Share.
 21.1+   -- Subsidiaries of the Registrant.
 23.1#   -- Consent of Vinson & Elkins L.L.P. (included in the opinion to be
            filed as Exhibit 5.1).
 23.2*   -- Consent of Independent Auditors, Ernst & Young LLP.
 24.1+   -- Power of Attorney for D. Lee Tobler.
 24.2+   -- Power of Attorney for Marshall O. Larsen.
 24.3+   -- Power of Attorney for Alexander MacLachlan.
 24.4+   -- Power of Attorney for Thomas G. Ricks.
 24.5+   -- Power of Attorney for Steven G. Rolls.
 27*     -- Financial Data Schedule
</TABLE>    
- --------
   
*  Filed herewith.     
+  Previously filed.
   
#  To be filed by amendment.     
 
  (b) Financial Statement Schedules.
 
  All schedules are omitted since the required information is inapplicable or
is not present in amounts sufficient to require submission of the schedule, or
because the information required is included in the Consolidated Financial
Statements and Notes thereto.
 
                                     II-2
<PAGE>
 
ITEM 17. UNDERTAKINGS
 
  The undersigned Registrant hereby undertakes:
 
    (1) To provide to the Underwriters at the closing specified in the
  Underwriting Agreement certificates in such denominations and registered in
  such names as required by the Underwriters to permit prompt delivery to
  each purchaser.
 
    (2) Insofar as indemnification for liabilities arising under the
  Securities Act may be permitted to directors, officers and controlling
  persons of the Registrant pursuant to the foregoing provisions, or
  otherwise, the Registrant has been advised that in the opinion of the
  Securities and Exchange Commission such indemnification is against public
  policy as expressed in said Act and is, therefore, unenforceable. In the
  event that a claim for indemnification against such liabilities (other than
  the payment by the Registrant of expenses incurred or paid by a director,
  officer or controlling person of the Registrant in the successful defense
  of any action, suit or proceeding) is asserted by such director, officer or
  controlling person in connection with the securities being registered, the
  Registrant will, unless in the opinion of its counsel the matter has been
  settled by controlling precedent, submit to a court of appropriate
  jurisdiction the question of whether such indemnification by it is against
  public policy as expressed in the Securities Act and will be governed by
  the final adjudication of such issue.
 
    (3) That for purposes of determining any liability under the Securities
  Act, the information omitted from the form of prospectus filed as part of
  this Registration Statement in reliance upon Rule 430A and contained in a
  form of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or
  (4) or 497(h) under the Securities Act shall be deemed to be part of this
  Registration Statement as of the time it was declared effective.
 
    (4) That for the purpose of determining any liability under the
  Securities Act, each post-effective amendment that contains a form of
  prospectus shall be deemed to be a new Registration Statement relating to
  the securities offered therein, and the offering of such securities at that
  time shall be deemed to be the initial bona fide offering thereof.
 
                                     II-3
<PAGE>
 
                                  SIGNATURES
   
  Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Austin, State of Texas,
on February 18, 1997.     
 
                                          DTM Corporation
                                          
                                                                             
                                          By:   /s/ John S. Murchison, III     
                                              ---------------------------------
                                                  John S. Murchison, III
                                            President, Chief Executive Officer
                                                       and Director
                                               (Principal Executive Officer)
 
  Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>    
<S>                                    <C>                   <C> 
                                        President, Chief
   /s/ John S. Murchison, III            Executive Officer
- -------------------------------------      and Director
       John S. Murchison, III          (Principal Executive
                                             Officer)
 
           *D. Lee Tobler               Chairman of the
- -------------------------------------       Board of
            D. Lee Tobler                  Directors
 
                                        Chief Financial
        /s/ Uday Bellary                    Officer,
- -------------------------------------    Secretary and
           Uday Bellary                    Treasurer
                                           (Principal
                                         Financial and
                                           Accounting
                                            Officer)
 
         *Marshall O. Larsen                Director                
- -------------------------------------                            February 18, 1997
         Marshall O. Larsen                                            
 
        *Alexander MacLachlan               Director
- -------------------------------------
        Alexander MacLachlan
 
          *Thomas G. Ricks                  Director
- -------------------------------------
           Thomas G. Ricks
 
          *Steven G. Rolls                  Director
- -------------------------------------
           Steven G. Rolls
   
*By:   /s/ John S. Murchison, III
- -------------------------------------
 John S. Murchison, III Attorney-in-
                 Fact
</TABLE>     
 
                                     II-4
<PAGE>
 
                               INDEX TO EXHIBITS
 
<TABLE>   
<CAPTION>
                                                                   SEQUENTIALLY
 EXHIBIT                                                             NUMBERED
 NUMBER                        DESCRIPTION                             PAGE
 -------                       -----------                         ------------
 <C>     <S>                                                       <C>
  1.1*   -- Form of Underwriting Agreement.
  3.1+   -- Amended and Restated Articles of Incorporation of
            Registrant.
  3.2+   -- Amended and Restated Bylaws of Registrant.
  4.1*   -- Form of Stock Certificate of Registrant
  5.1#   -- Opinion of Vinson & Elkins L.L.P.
 10.1+   -- DTM Corporation Equity Appreciation Plan.
 10.2+   -- Form of Supplemental Phantom Stock Appreciation
            Rights Agreement.
 10.3*   -- DTM Corporation Management Incentive Plan, as
            Restated.
 10.4+   -- DTM Corporation Stock Option Plan.
 10.5+   -- Patent License Agreement between DTM Corporation and
            the Board of Regents, The University of Texas,
            effective as of December 3, 1987.
 10.6+   -- Supplement to Patent License Agreement between DTM
            Corporation and the Board of Regents, The University
            of Texas, dated March 20, 1992.
 10.7*   -- Promissory Note to NationsBank of Texas, N.A.
 10.8*   -- Promissory Note to National City Bank.
 10.9*   -- Promissory Note to Texas Commerce Bank National
            Association.
 10.10*  -- Promissory Note to The B.F.Goodrich Company.
 10.11+  -- Amended and Restated Shareholders' Agreement.
 10.12+  -- Lease Agreement for Facilities in Austin, Texas.
 10.13+  -- Amendment to Patent License Agreement between DTM
            Corporation and the Board of Regents of The
            University of Texas, dated as of October 27, 1994.
 11.1*   -- Statement of Computation of Earnings Per Share.
 21.1+   -- Subsidiaries of the Registrant.
 23.1#   -- Consent of Vinson & Elkins L.L.P. (included in the
            opinion to be filed as Exhibit 5.1).
 23.2*   -- Consent of Independent Auditors, Ernst & Young LLP.
 24.1+   -- Power of Attorney for D. Lee Tobler.
 24.2+   -- Power of Attorney for Marshall O. Larsen.
 24.3+   -- Power of Attorney for Alexander MacLachlan.
 24.4+   -- Power of Attorney for Thomas G. Ricks.
 24.5+   -- Power of Attorney for Steven G. Rolls.
 27*     -- Financial Data Schedule.
</TABLE>    
- --------
   
*  Filed herewith.     
   
+  Previously filed.     
   
#  To be filed by amendment.     

<PAGE>

                                                                     Exhibit 1.1

                                                                  DRAFT: 2/17/97


                                DTM CORPORATION

                                2,553,000 Shares
                                  Common Stock
                               ($.0002 Par Value)

                             UNDERWRITING AGREEMENT
                             ----------------------

                                                           _______________, 1997

A.G. EDWARDS & SONS, INC.
LADENBURG THALMANN & CO. INC.
  As Representatives of the Several Underwriters
    c/o A.G. Edwards & Sons, Inc.
    One North Jefferson Avenue
    St. Louis, Missouri 63103


     The undersigned, DTM Corporation, a Texas corporation (the "Company"), The
B.F. Goodrich Company, a New York corporation ("Goodrich"), and the persons
listed on Schedule I hereto (collectively with Goodrich, the "Selling
Shareholders"), hereby address you as the representatives (the
"Representatives") of each of the persons, firms and corporations listed on
Schedule II hereto (collectively, the "Underwriters") and hereby confirm their
agreement with the several Underwriters as follows:

     1.  Description of Shares. The Company proposes to issue and sell to the
Underwriters 2,300,248 shares of its Common Stock, par value $.0002 per share,
and the Selling Shareholders propose to sell to the Underwriters a total of
252,752 shares of the Company's Common Stock, par value $.0002 per share, as set
forth on Schedule I hereto (such 2,553,000 shares of Common Stock are herein
referred to as the "Firm Shares"). Solely for the purpose of covering over-
allotments in the sale of the Firm Shares, Goodrich further proposes to grant
the right to the Underwriters to purchase up to an additional 255,300 shares
(the "Option Shares"), as provided in Section 3 of this Agreement. The Firm
Shares and the Option Shares are herein sometimes referred to as the "Shares"
and are more fully described in the Prospectus hereinafter defined.

     2.  Purchase, Sale and Delivery of Firm Shares. On the basis of the
representations, warranties and agreements herein contained, but subject to the
terms and conditions herein set forth, the Company agrees and each Selling
Shareholder agrees, severally and not jointly, to sell to the Underwriters, and
each such Underwriter agrees, severally and not jointly, (a) to purchase from
the Company and from each of the Selling Shareholders, pro rata, at a purchase
price of $_______ per share, the number of Firm Shares set forth opposite the
name of such Underwriter in Schedule II hereto and (b) to purchase from Goodrich
any additional number of Option Shares which such Underwriter may become
obligated to purchase pursuant to Section 3 hereof.

     The Company and the Selling Shareholders will deliver definitive
certificates for the Firm Shares at the office of A.G. Edwards & Sons, Inc., 77
Water Street, New York, New York ("Edwards' Office"), or such other place as you
and the Company may mutually agree upon, for the accounts of the Underwriters
against payment to the Company and the Selling Shareholders of the purchase
price for the Firm Shares sold by them to the several Underwriters by wire
transfer or certified or bank cashiers' check in federal (same day available)
funds payable to the order of the Company and the Selling Shareholders,
respectively, and delivered to One North Jefferson Avenue, St. Louis, Missouri
63103, or at such other place as may be agreed upon between you and the Company
(the "Place
<PAGE>
 
of Closing"), at 10:00 a.m., St. Louis time, on ________________, 1997, or at
such other time and date not later than five full business days thereafter as
you and the Company may agree, such time and date of payment and delivery being
herein called the "Closing Date."

     The certificates for the Firm Shares so to be delivered will be made
available to you for inspection at Edwards' Office (or such other place as you
and the Company may mutually agree upon) at least one full business day prior to
the Closing Date and will be in such names and denominations as you may request
at least three full business days prior to the Closing Date.

     It is understood that an Underwriter, individually, may (but shall not be
obligated to) make payment on behalf of the other Underwriters whose funds shall
not have been received prior to the Closing Date for Shares to be purchased by
such Underwriter. Any such payment by an Underwriter shall not relieve the other
Underwriters of any of their obligations hereunder.

     It is understood that the Underwriters propose to offer the Shares to the
public upon the terms and conditions set forth in the Registration Statement
hereinafter defined.

     3.  Purchase, Sale and Delivery of the Option Shares. Goodrich hereby
grants an option to the Underwriters to purchase from it up to 255,300 Option
Shares on the same terms and conditions as the Firm Shares; provided, however,
that such option may be exercised only for the purpose of covering any over-
allotments which may be made by them in the sale of the Firm Shares. No Option
Shares shall be sold or delivered unless the Firm Shares previously have been,
or simultaneously are, sold and delivered.

          The option is exercisable on behalf of the several Underwriters by
you, as Representatives, at any time, and from time to time, before the
expiration of 30 days from the date of this Agreement, for the purchase of all
or part of the Option Shares covered thereby, by notice given by you to the
Company and Goodrich in the manner provided in Section 13 hereof, setting forth
the number of Option Shares as to which the Underwriters are exercising the
option, and the date of delivery of said Option Shares, which date shall not be
more than five business days after such notice unless otherwise agreed to by the
parties. You may terminate the option at any time, as to any unexercised portion
thereof, by giving written notice to the Company and Goodrich to such effect.

     You, as Representatives, shall make such allocation of the Option Shares
among the Underwriters as may be required to eliminate purchases of fractional
Shares.

     Delivery of definitive certificates for the Option Shares with respect to
which the option shall have been exercised shall be made to or upon your order
at Edwards' Office (or at such other place as you and the Company may mutually
agree upon), against payment by you of the per share purchase price to Goodrich
by wire transfer or certified or bank cashier's check or checks, payable in
federal (same day available) funds. Such payment and delivery shall be made at
10:00 a.m., St. Louis time, on the date designated in the notice given by you as
above provided for, unless some other date and time are agreed upon, which date
and time of payment and delivery are called the "Option Closing Date." The
certificates for the Option Shares so to be delivered will be made available to
you for inspection at Edwards' Office at least one full business day prior to
the Option Closing Date and will be in such names and denominations as you may
request at least two full business days prior to the Option Closing Date. On the
Option Closing Date, the Company and Goodrich shall provide the Underwriters
such representations, warranties, opinions and covenants with respect to the
Option Shares as are required to be delivered on the Closing Date with respect
to the Firm Shares.

     4.  Representations, Warranties and Agreements of the Company, The B.F.
Goodrich Company and the Selling Shareholders.  (a)  The Company represents and
warrants to and agrees with each Underwriter that:

                                       2
<PAGE>
 
          (i)    A registration statement (Registration No. 333-04173) on Form 
     S-1 with respect to the Shares, including a preliminary prospectus, and
     such amendments to such registration statement as may have been required to
     the date of this Agreement, has been carefully prepared by the Company
     pursuant to and in conformity with the requirements of the Securities Act
     of 1933, as amended (the "Act"), and the Rules and Regulations (the "Rules
     and Regulations") of the Securities and Exchange Commission (the
     "Commission") thereunder and has been filed with the Commission under the
     Act. Copies of such registration statement, including any amendments
     thereto, each related preliminary prospectus (meeting the requirements of
     Rule 430 or 430A of the Rules and Regulations) contained therein, the
     exhibits, financial statements and schedules have heretofore been delivered
     by the Company to you. If such registration statement has not become
     effective under the Act, a further amendment to such registration
     statement, including a form of final prospectus, necessary to permit such
     registration statement to become effective will be filed promptly by the
     Company with the Commission. If such registration statement has become
     effective under the Act, a final prospectus containing information
     permitted to be omitted at the time of effectiveness by Rule 430A of the
     Rules and Regulations will be filed promptly by the Company with the
     Commission in accordance with Rule 424(b) of the Rules and Regulations. The
     term "Registration Statement" as used herein means the registration
     statement as amended at the time it becomes or became effective under the
     Act (the "Effective Date"), including financial statements and all exhibits
     and, if applicable, the information deemed to be included by Rule 430A of
     the Rules and Regulations. The term "Prospectus" as used herein means (i)
     the prospectus as first filed with the Commission pursuant to Rule 424(b)
     of the Rules and Regulations or, (ii) if no such filing is required, the
     form of final prospectus included in the Registration Statement at the
     Effective Date or (iii) if a Term Sheet or Abbreviated Term Sheet (as such
     terms are defined in Rules 434(b) and 434(c), respectively, of the Rules
     and Regulations) is filed with the Commission pursuant to Rule 424(b)(7) of
     the Rules and Regulations, the Term Sheet or Abbreviated Term Sheet and the
     last Preliminary Prospectus filed with the Commission prior to the time the
     Registration Statement became effective, taken together. The term
     "Preliminary Prospectus" as used herein shall mean a preliminary prospectus
     as contemplated by Rule 430 or 430A of the Rules and Regulations included
     at any time in the Registration Statement.

          (ii)   The Commission has not issued, and is not to the knowledge of
     the Company threatening to issue, an order preventing or suspending the use
     of any Preliminary Prospectus or the Prospectus nor instituted proceedings
     for that purpose. Each Preliminary Prospectus at its date of issue, the
     Registration Statement and the Prospectus and any amendments or supplements
     thereto contains or will contain, as the case may be, all statements which
     are required to be stated therein by, and in all material respects conform
     or will conform, as the case may be, to the requirements of, the Act and
     the Rules and Regulations. Neither the Registration Statement nor any
     amendment thereto, as of the applicable effective date, and neither the
     Prospectus nor any supplement thereto contains or will contain, as the case
     may be, any untrue statement of a material fact or omits or will omit to
     state any material fact required to be stated therein or necessary to make
     the statements therein, in the light of the circumstances under which they
     were made, not misleading; provided, however, that the Company does not
     make any representation or warranty as to information contained in or
     omitted from the Registration Statement or the Prospectus, or any such
     amendment or supplement, in reliance upon, and in conformity with, written
     information furnished to the Company by or on behalf of the Underwriters
     specifically for use in the preparation thereof.

          (iii)  The filing of the Registration Statement and the execution and
     delivery of this Agreement have been duly authorized by the Board of
     Directors of the Company; this Agreement constitutes a valid and legally
     binding obligation of the Company enforceable in accordance with its terms
     (except to the extent the enforceability of the indemnification and
     contribution provisions of Section 7 hereof may be limited by public policy
     considerations as expressed in the Act as construed by courts of competent
     jurisdiction, and except as enforceability may be limited by bankruptcy,
     insolvency, reorganization, moratorium and other laws affecting creditors'
     rights generally and by general principles of equity); the issue and sale
     of the Shares by the Company and the performance of this Agreement and the
     consummation of the transactions herein contemplated will not result in a
     violation of the Company's articles of incorporation or bylaws or

                                       3
<PAGE>
 
     result in a breach or violation of any of the terms and provisions of, or
     constitute a default under, or result in the creation or imposition of any
     lien, charge or encumbrance upon any properties or assets of the Company or
     its subsidiary under, any statute, or under any indenture, mortgage, deed
     of trust, note, loan agreement, sale and leaseback arrangement or other
     agreement or instrument to which the Company or its subsidiary is a party
     or by which they are bound or to which any of the properties or assets of
     the Company or its subsidiary is subject, or any order, rule or regulation
     of any court or governmental agency or body having jurisdiction over the
     Company or its subsidiary or their properties, except to such extent as
     does not materially adversely affect the business of the Company and its
     subsidiary taken as a whole; no consent, approval, authorization, order,
     registration or qualification of or with any court or governmental agency
     or body is required for the consummation of the transactions herein
     contemplated, except such as may be required by the National Association of
     Securities Dealers, Inc. (the "NASD") or under the Act or Rules and
     Regulations or any state securities laws.

          (iv)   Except as described in the Prospectus, neither the Company nor
     its subsidiary has sustained since the date of the latest audited financial
     statements included in the Prospectus any material loss or interference
     with its business from fire, explosion, flood or other calamity, whether or
     not covered by insurance, or from any labor dispute or court or
     governmental action, order or decree. Except as contemplated in the
     Prospectus, subsequent to the respective dates as of which information is
     given in the Registration Statement and the Prospectus, the Company and its
     subsidiary taken as a whole have not incurred any material liabilities or
     material obligations, direct or contingent, other than in the ordinary
     course of business, or entered into any material transactions not in the
     ordinary course of business, and there has not been any material change in
     the capital stock or long-term debt of the Company and its subsidiary taken
     as a whole or any material adverse change in the condition (financial or
     other), net worth, business, affairs, management, prospects or results of
     operations of the Company and its subsidiary taken as a whole.  The Company
     and its subsidiary have filed all material federal, state and foreign
     income and franchise tax returns and paid all taxes shown as due thereon;
     all tax liabilities are adequately provided for on the books of the Company
     and its subsidiary except to such extent as would not materially adversely
     affect the business of the Company and its subsidiary taken as a whole; the
     Company and its subsidiary have made all necessary payroll tax payments and
     are current in the payment thereof and up-to-date as of the date of this
     Agreement except to such extent as would not materially adversely affect
     the business of the Company and its subsidiary taken as a whole; and
     neither the Company nor its subsidiary has knowledge of any tax proceeding
     or action pending or threatened against the Company or its subsidiary which
     might materially adversely affect their business or property.

          (v)    Except as described in the Prospectus, there is not now pending
     or, to the knowledge of the Company, threatened or contemplated, any
     action, suit or proceeding to which the Company or its subsidiary is a
     party before or by any court or public, regulatory or governmental agency
     or body which might be expected to result (individually or in the
     aggregate) in any material adverse change in the condition (financial or
     other), business or prospects of the Company and its subsidiary taken as a
     whole, or might be expected (individually or in the aggregate) to
     materially and adversely affect the properties or assets thereof; and there
     are no contracts or documents of the Company or its subsidiary which would
     be required to be filed as exhibits to the Registration Statement by the
     Act or by the Rules and Regulations which have not been filed as exhibits
     to the Registration Statement.

          (vi)   The Company has duly and validly authorized capital stock as
     described in the Prospectus; all outstanding shares of Common Stock of the
     Company and the Shares conform, or when issued will conform, to the
     description thereof in the Registration Statement and the Prospectus and
     have been, or, when issued and paid for will be, duly authorized, validly
     issued, fully paid and nonassessable; and the issuance of the Shares to be
     purchased from the Company hereunder is not subject to preemptive rights.

          (vii)  The Company and its subsidiary have been duly incorporated and
     are validly existing as corporations in good standing under the laws of the
     states or other jurisdictions in which they are

                                       4
<PAGE>
 
     incorporated, with full power and authority (corporate and other) to own,
     lease and operate their properties and conduct their businesses as
     described in the Registration Statement; the Company and its subsidiary are
     duly qualified to do business as foreign corporations in good standing in
     each state or other jurisdiction in which their ownership or leasing of
     property or conduct of business legally requires such qualification, except
     where the failure to be so qualified would not have a material adverse
     effect on the ability of the Company and its subsidiary to conduct its or
     their business as described in the Registration Statement; and the
     outstanding shares of capital stock of the Company's subsidiary have been
     duly authorized and validly issued, are fully paid and nonassessable and
     are owned by the Company free and clear of any mortgage, pledge, lien,
     encumbrance, charge or adverse claim and are not the subject of any
     agreement or understanding with any person; no options, warrants or other
     rights to purchase, agreement or other obligations to issue or other rights
     to convert any obligations into shares of capital stock or ownership
     interests in the subsidiary are outstanding.

          (viii) Ernst & Young LLP, the accounting firm which has audited the
     financial statements filed with the Commission as a part of the
     Registration Statement, is an independent public accounting firm within the
     meaning of the Act and the Rules and Regulations.

          (ix)   The consolidated financial statements and schedules of the
     Company and its subsidiary, including the notes thereto, filed with and as
     a part of the Registration Statement, present fairly in all material
     respects the consolidated financial position of the Company and its
     subsidiary as of the respective dates thereof and the consolidated results
     of operations and statements of cash flow for the respective periods
     covered thereby, all in conformity with generally accepted accounting
     principles applied on a consistent basis throughout the periods involved
     except as otherwise disclosed in the Prospectus. The selected financial
     data included in the Registration Statement and Prospectus present fairly
     the information shown therein and have been compiled on a basis consistent
     with that of the audited financial statements in the Registration Statement
     and Prospectus.

          (x)    Neither the Company nor its subsidiary is in default with
     respect to any contract or agreement to which it is a party; provided that
     this representation shall not apply to defaults which in the aggregate are
     not materially adverse to the condition, financial or other, of the
     business or prospects of the Company and its subsidiary taken as a whole.

          (xi)   Neither the Company nor its subsidiary is in violation of any
     laws, ordinances or governmental rules or regulations to which it is
     subject, and neither the Company nor its subsidiary has failed to obtain
     any other licenses, permits, franchises, easements, consents, or other
     governmental authorizations necessary to the ownership, leasing and
     operation of its properties or to the conduct of its business, which
     violation or failure would materially adversely affect the business,
     operations, properties, prospects, profits or condition (financial or
     other) of the Company and its subsidiary taken as a whole. Neither the
     Company nor its subsidiary has, at any time during the past five years (A)
     made any unlawful contributions to any candidate for any political office,
     or failed fully to disclose any contribution in violation of law, or (B)
     made any payment to state, federal or foreign government officer or
     officers, or other person charged with similar public or quasi-public duty
     (other than payment required or permitted by applicable law).

          (xii)  Except as described in the Prospectus, (a) the Company and its
     subsidiary own or possess, or can acquire on reasonable terms, adequate
     patents, patent licenses, trademarks, service marks and trade names
     necessary to conduct the business now operated by them, and (b) neither the
     Company nor its subsidiary has received any notice of infringement of or
     conflict with asserted rights of others with respect to any patents, patent
     licenses, trademarks, service marks or trade names which, singly or in the
     aggregate, if the subject of an unfavorable decision, ruling or finding,
     would materially adversely affect the conduct of the business, operations,
     financial condition or income of the Company and its subsidiary taken as a
     whole.

                                       5
<PAGE>
 
          (xiii) The Company and its subsidiary have good and marketable title
     to all property owned by them, free and clear of all liens, encumbrances,
     restrictions and defects except such as are described in the Registration
     Statement or do not interfere in any material respect with the use made and
     proposed to be made of such property; and any property held under lease or
     sublease by the Company or its subsidiary is held under valid, subsisting
     and enforceable leases or subleases with such exceptions as are not
     material and do not interfere in any material respect with the use made and
     proposed to be made of such property by the Company and its subsidiary, and
     neither the Company nor its subsidiary has any notice or knowledge of any
     material claim of any sort which has been, or is reasonably likely to be,
     asserted by anyone adverse to the Company's or its subsidiary's rights as
     lessee or sublessee under any lease or sublease described above, or
     affecting or questioning the Company's or its subsidiary's rights to the
     continued possession of the leased or subleased premises under any such
     lease or sublease in conflict with the terms thereof.

          (xiv)  Except as described in the Prospectus, to the knowledge of the
     Company, there is no factual basis for any action, suit or other proceeding
     involving the Company or its subsidiary or any of their material assets for
     any failure of the Company or its subsidiary, or any predecessor thereof,
     to comply with any requirements of federal, state or local regulation
     relating to air, water, solid waste management, hazardous or toxic
     substances, or the protection of health or the environment. Except as
     described in the Prospectus, none of the property owned or leased by the
     Company or its subsidiary is, to the knowledge of the Company, contaminated
     with any waste or hazardous substances, and neither the Company nor its
     subsidiary may be deemed an "owner or operator" of a "facility" or "vessel"
     which owns, possesses, transports, generates or disposes of a "hazardous
     substance" as those terms are defined in (S)9601 of the Comprehensive
     Environmental Response, Compensation and Liability Act of 1980, 42 U.S.C.
     (S)9601 et seq.
             ------ 

          (xv)   No labor disturbance exists with the employees of the Company
     or its subsidiary or, to the knowledge of the Company, is imminent which
     would have a material adverse effect on the Company and its subsidiary
     taken as a whole.

          (xvi)  The Company has not taken nor will it take, directly or
     indirectly, any action designed to or which might reasonably be expected to
     cause or result in stabilization or manipulation of the price of the
     Company's Common Stock, and the Company is not aware of any such action
     taken or to be taken by affiliates of the Company.

          (xvii) All issuances of stock appreciation rights pursuant to the DTM
     Corporation Equity Appreciation Plan were exempt from the registration
     requirements of the Act.

          (xviii) The Company is not an "investment company" or a company
     "controlled" by an "investment company" with the meaning of the Investment
     Company Act of 1940, as amended.

     (b)  Goodrich represents and warrants to and agrees with each Underwriter
that:

          (i)    To Goodrich's knowledge, the representations and warranties of
     the Company set forth in subsection (a) of this Section 4 are true and
     correct. For purposes of this Section 4(b), the knowledge of Goodrich is
     deemed to include the knowledge of the following directors, officers,
     employees, agents and representatives of Goodrich who have had significant
     involvement with the business and affairs of the Company: D. Lee Tobler,
     Marshall O. Larsen, Steven G. Rolls, John Shamanis, Nicholas J. Calise and
     Sonja M. Haller. For purposes of this subsection (i), the knowledge of
     Messrs. Tobler, Larsen and Rolls shall include what each of the foregoing
     individuals knows or should have known in his capacity as director of the
     Company or in connection with any duties specifically delegated to him by
     the Board of Directors of the Company, and the knowledge of Messrs.
     Shamanis and Calise and Ms. Haller shall include what each of such
     individuals knows, or in the absence of his or her negligence should have
     known, in the scope of any representation of the Company or Goodrich
     undertaken by such person.

                                       6
<PAGE>
 
          (ii)   Other than the individuals identified in subsection (i) above,
     no other directors, officers, employees, agents or representatives of
     Goodrich have had significant involvement with the business of the Company.

    (c)   Each Selling Shareholder severally represents and warrants to and
agrees with each Underwriter that:

          (i)    All authorizations and consents necessary for the execution and
    delivery by it of this Agreement and the sale and delivery of the Shares to
    be sold by such Selling Shareholder hereunder have been given and are in
    full force and effect on the date hereof and will be in full force and
    effect on the Closing Date (and, if applicable, the Option Closing Date).

          (ii)   Such Selling Shareholder has, and on the Closing Date (and, if
    applicable, the Option Closing Date) will have, good and valid title to the
    Shares to be sold by such Selling Shareholder, free and clear of all liens,
    mortgages, pledges, encumbrances, claims, equities and security interests
    whatsoever, and full right, power and authority to enter into this Agreement
    and to sell, assign, transfer and deliver the Shares to be sold by such
    Selling Shareholder hereunder.

          (iii)  Upon delivery of and payment for such Shares hereunder, the
    several Underwriters will acquire valid and unencumbered title to such
    Shares to be sold by such Selling Shareholder hereunder, free and clear of
    all liens, mortgages, pledges, encumbrances, claims, equities and security
    interests whatsoever.

          (iv)   Such Selling Shareholder has not taken and will not take,
    directly or indirectly, any action designed to or which might be reasonably
    expected to cause or result in stabilization or manipulation of the price of
    the Company's Common Stock, and such Selling Shareholder is not aware of any
    such action taken or to be taken by affiliates of such Selling Shareholder.

          (v)    Certificates in negotiable form representing all of the Shares
    to be sold by such Selling Shareholder hereunder have been placed in the
    custody of D. Lee Tobler and Uday Bellary (the "Custodians") under a Power
    of Attorney and Custody Agreement (the "Custody Agreement"), duly executed
    and delivered by such Selling Shareholder, with the Custodians having the
    authority to deliver the Shares to be sold by such Selling Shareholder
    hereunder, which Custody Agreement appoints the Custodians as such Selling
    Shareholder's attorneys-in-fact (the "Attorneys-in-Fact") with the 
    Attorneys-in-Fact having authority to execute and deliver this Agreement on
    behalf of such Selling Shareholder, to determine the purchase price to be
    paid by the Underwriters to the Selling Shareholders as provided in Section
    2, to authorize the delivery of the Shares to be sold by it hereunder and
    otherwise to act on behalf of such Selling Shareholder in connection with
    the transactions contemplated by this Agreement and such Custody Agreement.

          (vi)   The Shares represented by the certificates held in custody for
    such Selling Shareholder under the Custody Agreement are subject to the
    interests of the Underwriters hereunder, and the arrangements made by such
    Selling Shareholder for such custody, and the appointment by such Selling
    Shareholder of the Custodians and of the Attorneys-in-Fact under the Custody
    Agreement, are to that extent irrevocable.

          (vii)  The obligations of such Selling Shareholders hereunder shall
    not be terminated by operation of law, and if any such event should occur
    before the delivery of the Shares hereunder, certificates representing the
    Shares shall be delivered by or on behalf of each Selling Shareholder in
    accordance with the terms and conditions of this Agreement and of the
    Custody Agreement, and actions taken by the Custodians pursuant to the
    Custody Agreement or by the Attorneys-in-Fact pursuant to the Power of
    Attorney shall be as valid as if such event had not occurred, regardless of
    whether or not the Custodians or Attorneys-in-Fact, or any of them, shall
    have received notice of such event.

                                       7
<PAGE>
 
          (viii)  Such Selling Shareholder is not prompted to sell shares of
    Common Stock by any material non-public information concerning the Company
    or its subsidiary which is not included in the Registration Statement.

    (d) Any certificate signed by any officer of the Company or Goodrich and
delivered to you or to counsel for the Underwriters shall be deemed a
representation and warranty by the Company or Goodrich, as applicable, to each
Underwriter as to the matters covered thereby; and any certificate signed by or
on behalf of any Selling Shareholder as such and delivered to you or to counsel
for the Underwriters shall be deemed a representation and warranty by such
Selling Shareholder to each Underwriter as to the matters covered thereby.

    5.    Additional Covenants.  The Company, with respect to itself, and, where
expressly indicated, Goodrich and/or the Selling Shareholders, each with respect
to itself, covenant and agree with the several Underwriters that:

    (a) If the Registration Statement is not effective under the Act, the
Company will use its best efforts to cause the Registration Statement to become
effective as promptly as possible, and it will notify you, promptly after it
shall receive notice thereof, of the time when the Registration Statement has
become effective. The Company (i) will prepare and timely file with the
Commission under Rule 424(b) of the Rules and Regulations, if required, a
Prospectus containing information previously omitted at the time of
effectiveness of the Registration Statement in reliance on Rule 430A of the
Rules and Regulations or otherwise or Term Sheet or Abbreviated Term Sheet, as
applicable; (ii) will not file any amendment to the Registration Statement or
supplement to the Prospectus of which the Underwriters shall not previously have
been advised and furnished with a copy or to which the Underwriters shall have
reasonably objected in writing or which is not in compliance with the Rules and
Regulations; and (iii) will promptly notify you after it shall have received
notice thereof of the time when any amendment to the Registration Statement
becomes effective or when any supplement to the Prospectus has been filed.

    (b) The Company will advise the Underwriters promptly, after it shall
receive notice or obtain knowledge thereof, of any request of the Commission for
amendment of the Registration Statement or for the preparation, filing and
circulation of a supplement to the Prospectus or for any additional information,
or of the issuance by the Commission of any stop order suspending the
effectiveness of the Registration Statement or the use of the Prospectus or of
the institution or threatening of any proceedings for that purpose, and the
Company will use its best efforts to prevent the issuance of any such stop order
preventing or suspending the use of the Prospectus and to obtain as soon as
possible the lifting thereof, if issued.

    (c) The Company will cooperate with the Underwriters and their counsel in
endeavoring to qualify the Shares for sale under the securities laws of such
jurisdictions as they may have designated and will make such applications, file
such documents, and furnish such information as may be necessary for that
purpose, provided the Company shall not be required to qualify as a foreign
corporation or to file a general consent to service of process in any
jurisdiction where it is not now so qualified or required to file such a consent
or to subject itself to taxation as doing business in any jurisdiction where it
is not now so taxed. The Company will, from time to time, file such statements,
reports, and other documents, as are or may be required to continue such
qualifications in effect for so long a period as the Underwriters may reasonably
request.

    (d) The Company will deliver to, or upon the order of, the Underwriters,
without charge from time to time, as many copies of any Preliminary Prospectus
as they may reasonably request. The Company will deliver to, or upon the order
of, the Underwriters without charge as many copies of the Prospectus, or as it
thereafter may be amended or supplemented, as they may from time to time
reasonably request. The Company consents to the use of such Prospectus by the
Underwriters and by all dealers to whom the Shares may be sold, both in
connection with the offering or sale of the Shares and for such period of time
thereafter as the Prospectus is required by law to be delivered in connection
with the offering or sale of the Shares.  The Company further consents to the
use of such Prospectus by the Underwriters and by all dealers to whom the Shares
may be sold for other ordinary and customary purposes at the Underwriters' sole
risk.  The Company will deliver to the Underwriters at or before the Closing
Date

                                       8
<PAGE>
 
two signed copies of the Registration Statement and all amendments thereto
including all exhibits filed therewith, and will deliver to the Underwriters
such number of copies of the Registration Statement, without exhibits, and of
all amendments thereto, as they may reasonably request.

    (e) If, during the period in which a prospectus is required by law to be
delivered by an Underwriter or dealer, any event shall occur as a result of
which, in the judgment of the Company or in your judgment or in the opinion of
counsel for the Underwriters, it becomes necessary to amend or supplement the
Prospectus in order to make the statements therein, in light of the
circumstances existing at the time the Prospectus is delivered to a purchaser,
not misleading, or, if it is necessary at any time to amend or supplement the
Prospectus to comply with any law, the Company promptly will prepare and file
with the Commission an appropriate amendment to the Registration Statement or
supplement to the Prospectus so that the Prospectus as so amended or
supplemented will not, in the light of the circumstances when it is so
delivered, be misleading, or so that the Prospectus will comply with law.

    (f) The Company will make generally available to its shareholders as soon as
it is practicable to do so, but in any event not later than 15 months after the
effective date of the Registration Statement, an earnings statement in
reasonable detail, covering a period of at least 12 consecutive months beginning
after the effective date of the Registration Statement, which earnings statement
shall satisfy the requirements of Section 11(a) of the Act and Rule 158 of the
Rules and Regulations and will advise the Underwriters in writing when such
statement has been so made available.

    (g) The Company will, for a period of five years from the Closing Date,
deliver to the Underwriters at their principal executive offices a reasonable
number of copies of annual reports, quarterly reports, current reports and
copies of all other documents, reports and information furnished by the Company
to its shareholders or filed with any securities exchange pursuant to the
requirements of such exchange or with the Commission pursuant to the Act or the
Securities Exchange Act of 1934, as amended (the "1934 Act"). The Company will
deliver to the Underwriters similar reports with respect to any significant
subsidiaries, as that term is defined in the Rules and Regulations, which are
not consolidated in the Company's financial statements. Any report, document or
other information required to be furnished under this paragraph (g) shall be
furnished as soon as practicable after such report, document or information
becomes available.

    (h) The Company will apply the proceeds from the sale of the Shares as set
forth in the description under "Use of Proceeds" in the Prospectus, which
description complies in all respects with the requirements of Item 504 of
Regulation S-K.

    (i) The Company will file with the Commission such reports on Form SR as may
be required pursuant to Rule 463 under the Act.

    (j) The Company will supply you with copies of all correspondence to and
from, and all documents issued to and by, the Commission in connection with the
registration of the Shares under the Act.

    (k) Prior to the Closing Date (and, if applicable, the Option Closing Date),
the Company will furnish to you promptly, copies of any unaudited interim
consolidated financial statements of the Company and its subsidiary for any
periods subsequent to the periods covered by the financial statements appearing
in the Registration Statement and the Prospectus.

    (l) Prior to the Closing Date (and, if applicable, the Option Closing Date),
neither the Company nor any Selling Shareholder will issue any press releases
directly or indirectly and will hold no press conferences with respect to the
Company or its subsidiary, the financial condition, results of operations,
business, properties, assets or liabilities of the Company or its subsidiary, or
the offering of the Shares, without prior written notice to the Representatives.
The Company and each Selling Shareholder will agree with the Underwriters prior
to any other public communication, as to the nature and scope of such
communications and the limitations thereof.

                                       9
<PAGE>
 
    (m) The Company will use its best efforts to obtain approval for and
maintain the quotation of the Shares on The Nasdaq Stock Market's National
Market ("NASDAQ").

    (n) For a period of 180 days from the Effective Date, the Company will not,
directly or indirectly, sell, contract to sell or otherwise dispose of any
shares of Common Stock, any securities exchangeable for Common Stock or any
other rights to acquire such shares without your prior written consent, except
for the Shares sold hereunder and except for sales of shares of Common Stock to
the Company's employees pursuant to the exercise of options under the DTM
Corporation Stock Option Plan and the DTM Corporation Equity Appreciation Plan.

    (o) For a period of 180 days from the Effective Date, neither Goodrich nor
any other Selling Shareholder will directly or indirectly sell, contract to sell
or otherwise dispose of any shares of Common Stock or rights to acquire such
shares without your prior written consent, except for the Shares sold hereunder.

    (p) The Company and its subsidiary will maintain and keep accurate books and
records reflecting their assets and maintain internal accounting controls which
provide reasonable assurance that (1) transactions are executed in accordance
with management's authorization, (2) transactions are recorded as necessary to
permit the preparation of the Company's consolidated financial statements and to
maintain accountability for the assets of the Company and its subsidiary, 
(3) access to the assets of the Company and its subsidiary is permitted only in
accordance with management's authorization, and (4) the recorded accounts of the
assets of the Company and its subsidiary are compared with existing assets at
reasonable intervals.

    6.    Conditions of Underwriters' Obligations.  The several obligations of
the Underwriters to purchase and pay for the Shares, as provided herein, shall
be subject to the accuracy in all material respects, as of the date hereof and
as of the Closing Date (and, if applicable, the Option Closing Date), of the
representations and warranties of the Company, Goodrich and the Selling
Shareholders contained herein, to the performance in all material respects by
the Company, Goodrich and the Selling Shareholders of their covenants and
obligations hereunder, and to the following additional conditions:

    (a) All filings required by Rule 424 and Rule 430A of the Rules and
Regulations shall have been made. No stop order suspending the effectiveness of
the Registration Statement, as amended from time to time, shall have been issued
and no proceeding for that purpose shall have been initiated or, to the
knowledge of the Company or any Underwriter, threatened or contemplated by the
Commission, and any request of the Commission for additional information (to be
included in the Registration Statement or the Prospectus or otherwise) shall
have been complied with to the reasonable satisfaction of the Underwriters.

    (b) No Underwriter shall have disclosed in writing to the Company on or
prior to the Closing Date (and, if applicable, the Option Closing Date), that
the Registration Statement or Prospectus or any amendment or supplement thereto
contains an untrue statement of fact which, in the opinion of counsel to the
Underwriters, is material, or omits to state a fact which, in the opinion of
such counsel, is material and is required to be stated therein or is necessary
to make the statements therein, in light of the circumstances under which they
were made, not misleading.

    (c) On the Closing Date (and, if applicable, the Option Closing Date), you
shall have received the opinion of Vinson & Elkins L.L.P., counsel for the
Company, addressed to you and dated the Closing Date (and, if applicable, the
Option Closing Date), to the effect that:

          (i) The Company has been duly incorporated and is validly existing as
    a corporation in good standing under the laws of the State of Texas, with
    full corporate power and authority to own, lease and operate its properties
    and conduct its business as described in the Registration Statement; the
    Company  is duly qualified to do business as a foreign corporation in good
    standing in each state or other jurisdiction in which its ownership or
    leasing of property or conduct of business requires such qualification,
    except where

                                       10
<PAGE>
 
    the failure to be so qualified would not have a material adverse effect on
    the ability of the Company  to conduct its business as described in the
    Registration Statement.

          (ii) The Company's authorized capital stock is as set forth under the
    heading "Capitalization" in the Prospectus; all outstanding shares of Common
    Stock and the Shares conform to the description thereof in the Prospectus
    under the heading "Description of Capital Stock", and the outstanding shares
    of Common Stock have been duly authorized and are validly issued, fully paid
    and non-assessable; the Shares to be sold by the Company have been duly
    authorized and, when delivered and paid for in accordance with this
    Agreement, will be validly issued, fully paid and non-assessable, and the
    shareholders of the Company have no preemptive rights with respect to the
    Shares.

          (iii)  The Registration Statement has become effective under the Act
    and, to the knowledge of such counsel, no stop order suspending the
    effectiveness of the Registration Statement has been issued and no
    proceedings for that purpose have been instituted or are pending or
    contemplated under the Act.

          (iv) The Registration Statement and the Prospectus, and each amendment
    or supplement thereto, as of their respective effective or issue date,
    complied as to form in all material respects with the requirements of the
    Act and the applicable rules and regulations (except that such counsel need
    express no opinion as to the financial statements or other financial data).

          (v) The descriptions in the Registration Statement and Prospectus of
    contracts and other documents filed as exhibits to the Registration
    Statement are accurate in all material respects.

          (vi) No authorization, approval, consent, order, registration or
    qualification of or with any court or governmental body, authority or agency
    is required with respect to the Company in connection with the transactions
    contemplated by this Agreement, except such as may be required under the Act
    or the Rules and Regulations or as may be required by the NASD or under
    state securities laws in connection with the purchase and distribution of
    the Shares by the Underwriters.

          (vii)  The filing of the Registration Statement has been duly
    authorized by the Board of Directors of the Company. This Agreement has been
    duly authorized, executed and delivered by the Company. The performance of
    this Agreement and the consummation of the transactions herein contemplated
    will not result in a violation of the Company's articles of incorporation or
    bylaws or result in a breach or violation of any of the terms and provisions
    of, or constitute a default under, or result in the creation or imposition
    of any lien, charge or encumbrance upon any properties or assets of the
    Company and its subsidiary under, any statute, or under any indenture,
    mortgage, deed of trust, note, loan agreement, sale and leaseback
    arrangement, or any other agreement or instrument known to such counsel to
    which the Company or its subsidiary is a party or by which they are bound or
    to which any of the properties or assets of the Company or its subsidiary
    are subject, or any order, rule or regulation known to such counsel of any
    court or governmental agency or body having jurisdiction over the Company or
    its subsidiary or their properties, except, in the case of any such
    violation, breach, default, creation or imposition, to such extent as does
    not materially adversely affect the business of the Company and its
    subsidiary taken as a whole.

          (viii)  To the knowledge of such counsel, there are no contracts or
    documents of a character required to be described in the Registration
    Statement or the Prospectus or to be filed as an exhibit to the Registration
    Statement which are not described or filed as required.

          (ix) The statements made in the Registration Statement under the
    captions "Dividend Policy", "Capitalization" and "Description of Capital
    Stock", to the extent that they constitute summaries of documents

                                       11
<PAGE>
 
    referred to therein or matters of law or legal conclusions, have been
    reviewed by such counsel and are accurate summaries and fairly present the
    information disclosed therein.

          (x) The Company is not an "investment company" or a company
    "controlled" by an "investment company" within the meaning of the Investment
    Company Act of 1940, as amended.

    In addition, such counsel shall state that they have participated in
conferences with officers and other representatives of the Company,
representatives of the independent accountants of the Company and
representatives of the Underwriters and their counsel at which the contents of
the Registration Statement and Prospectus and related matters were discussed and
that in the course of such participation, no facts have come to their attention
that would lead them to believe that the Registration Statement, either at its
effective date or on the date hereof, contains any untrue statement of a
material fact or omits to state a material fact required to be stated therein or
necessary to make the statements therein not misleading or that the Prospectus,
either at the time it was filed pursuant to Rule 424(b) or on the date hereof,
contains an untrue statement of a material fact or omits to state a material
fact required to be stated therein or necessary to make the statements therein
not misleading (it being understood that such counsel shall express no comment
as to the financial statements and schedules and other financial data included
in the Registration Statement or the Prospectus).

    (d) On the Closing Date (and, if applicable, the Option Closing Date), you
shall have received the opinion of Nicholas J. Calise, Associate General Counsel
of Goodrich, addressed to you and dated the Closing Date (and, if applicable,
the Option Closing Date), to the effect that:

          (i) Goodrich has duly authorized, executed and delivered the Custody
    Agreement and Power of Attorney, appointing D. Lee Tobler and Uday Bellary
    as its Custodians with authority to take custody of and deliver the Shares
    as represented by certificates on behalf of Goodrich in connection with the
    transactions contemplated by this Agreement and the Custody Agreement and
    appointing D. Lee Tobler and Uday Bellary as Goodrich's attorneys-in-fact
    with authority to execute and deliver this Agreement on behalf of Goodrich
    and otherwise to act on behalf of Goodrich in connection with the
    transactions contemplated by this Agreement and the Custody Agreement.

          (ii) This Agreement has been duly authorized, executed and delivered
    on behalf of  Goodrich, and is a valid and legally binding obligation of
    Goodrich.

          (iii)  Goodrich has full legal right, power and authority, and any
    approval required by law (other than as required by the Act, the NASD and
    state securities and Blue Sky Laws) to sell, assign, transfer and deliver
    the Shares to be sold by it.

          (iv) No consent, approval, authorization or order of any court, or
    governmental agency or body is required for consummation of the transactions
    contemplated by this Agreement in connection with the Shares to be sold by
    Goodrich hereunder except such as may be required under the Act or the Rules
    and Regulations or as may be required by the NASD or under state securities
    laws.

          (v) Goodrich has good and valid title to the Shares being sold by it
    hereunder, free and clear of all liens, mortgages, pledges, encumbrances,
    claims, equities and security interests, and has transferred to the
    Underwriters good and valid title to the Shares being sold by it on the
    Option Closing Date, free and clear of all liens, mortgages, pledges,
    encumbrances, claims, equities and security interests whatsoever.

          (vi) To the knowledge of such counsel, (A) there are no material
    (individually, or in the aggregate) legal, governmental or regulatory
    proceedings pending or threatened to which the Company or its subsidiary is
    a party or of which the business or properties of the Company or its
    subsidiary is the subject which are not disclosed in the Registration
    Statement and Prospectus and (B) there are no statutes or

                                       12
<PAGE>
 
    regulations required to be described in the Registration Statement or
    Prospectus which are not described as required.

    In rendering the foregoing opinion, such counsel may rely, provided that the
opinion shall state that you and they are entitled to so rely, (1) as to matters
involving laws of any jurisdiction other than Texas or Federal law, upon
opinions addressed to the Underwriters of other counsel satisfactory to them and
Gardere & Wynne, L.L.P. (2) as to all matters of fact, upon certificates and
written statements of Goodrich or the Company.

    (e) On the Closing Date, you shall have received the opinion of
________________, counsel to DTM Holdings Ltd. ("DTM Holdings") and Dr. Joseph
J. Beaman ("Dr. Beaman"), addressed to you and dated the Closing Date, to the
effect that:

          (i) Each of DTM Holdings and Dr. Beaman has duly authorized, executed
    and delivered the Custody Agreement, appointing D. Lee Tobler and Uday
    Bellary as its Custodians with authority to take custody of and deliver the
    Shares as represented by certificates on behalf of DTM Holdings and Dr.
    Beaman in connection with the transactions contemplated by this Agreement
    and the Custody Agreement and appointing D. Lee Tobler and Uday Bellary as
    DTM Holdings' attorneys-in-fact with authority to execute and deliver this
    Agreement on behalf of DTM Holdings and Dr. Beaman and otherwise to act on
    behalf of DTM Holdings and Dr. Beaman in connection with the transactions
    contemplated by this Agreement and the Custody Agreement.

          (ii) This Agreement has been duly authorized, executed and delivered
    on behalf of each of DTM Holdings and Dr. Beaman, and is a valid and legally
    binding obligation of DTM Holdings and Dr. Beaman.

          (iii)  Each of DTM Holdings and Dr. Beaman has full legal right, power
    and authority, and any approval required by law (other than as required by
    the Act, the NASD and state securities and Blue Sky Laws) to sell, assign,
    transfer and deliver the Shares to be sold by it.

          (iv) No consent, approval, authorization or order of any court, or
    governmental agency or body is required for consummation of the transactions
    contemplated by this Agreement in connection with the Shares to be sold by
    DTM Holdings and Dr. Beaman hereunder except such as may be required under
    the Act or the Rules and Regulations or as may be required by the NASD or
    under state securities laws.

          (v) Each of DTM Holdings and Dr. Beaman has good and valid title to
    the Shares being sold by it hereunder, free and clear of all liens,
    mortgages, pledges, encumbrances, claims, equities and security interests,
    and has transferred to the Underwriters good and valid title to the Shares
    being sold by it on the Closing Date, free and clear of all liens,
    mortgages, pledges, encumbrances, claims, equities and security interests
    whatsoever.

    In rendering the foregoing opinion, such counsel may rely, provided that the
opinion shall state that you and they are entitled to so rely, (1) as to matters
involving laws of any jurisdiction other than Texas or Federal law, upon
opinions addressed to the Underwriters of other counsel satisfactory to them and
Gardere & Wynne, L.L.P. (2) as to all matters of fact, upon certificates and
written statements of DTM Holdings.

    (f) You shall have received on the Closing Date (and, if applicable, the
Option Closing Date), from Gardere & Wynne, L.L.P., counsel to the Underwriters,
such opinion or opinions, dated the Closing Date (and, if applicable, the Option
Closing Date) with respect to the incorporation of the Company, the validity of
the Shares, the Registration Statement, the Prospectus and other related matters
as you may reasonably require; the Company and Selling Shareholders shall have
furnished to such counsel such documents as they reasonably request for the
purpose of enabling them to pass on such matters.

                                       13
<PAGE>
 
    (g) You shall have received at or prior to the Closing Date a memorandum or
memoranda, in form and substance satisfactory to you, with respect to the
qualification for offering and sale by the Underwriters of the Shares under
state securities or Blue Sky laws of such jurisdictions as the Underwriters may
have designated to the Company.

    (h) On the business day immediately preceding the date of this Agreement and
on the Closing Date (and, if applicable, the Option Closing Date), you shall
have received from Ernst & Young LLP, a letter or letters, dated the date of
this Agreement and the Closing Date (and, if applicable, the Option Closing
Date), respectively, in form and substance satisfactory to you, confirming that
they are independent public accountants with respect to the Company within the
meaning of the Act and the published Rules and Regulations, and any information
set forth in the Registration Statement in response to Item 509 of Regulation S-
K is correct insofar as it relates to them, and stating to the effect set forth
in Schedule III hereto.

    (i) Except as contemplated in the Prospectus, (i) neither the Company nor
its subsidiary shall have sustained since the date of the latest audited
financial statements included in the Prospectus any loss or interference with
its business from fire, explosion, flood or other calamity, whether or not
covered by insurance, or from any labor dispute or court or governmental action,
order or decree; and (ii) subsequent to the respective dates as of which
information is given in the Registration Statement and the Prospectus, neither
the Company nor its subsidiary shall have incurred any liability or obligation,
direct or contingent, or entered into transactions, and there shall not have
been any change in the capital stock or long-term debt of the Company and its
subsidiary or any change in the condition (financial or other), net worth,
business, affairs, management, prospects or results of operations of the Company
or its subsidiary, the effect of which, in any such case described in clause (i)
or (ii), is in your reasonable judgment so material or adverse as to make it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Shares being delivered on such Closing Date (and, if applicable, the
Option Closing Date) on the terms and in the manner contemplated in the
Prospectus.

    (j) There shall not have occurred any of the following: (i) a suspension or
material limitation in trading in securities generally on the New York Stock
Exchange or the American Stock Exchange or the establishing on such exchanges by
the Commission or by such exchanges of minimum or maximum prices which are not
in force and effect on the date hereof; (ii) a general moratorium on commercial
banking activities declared by either federal or state authorities; (iii) the
outbreak or escalation of hostilities involving the United States or the
declaration by the United States of a national emergency or war, if the effect
of any such event specified in this clause (iii) in your reasonable judgment
makes it impracticable or inadvisable to proceed with the public offering or the
delivery of the Shares in the manner contemplated in the Prospectus; (iv) any
calamity or crisis, change in national, international or world affairs, act of
God, change in the international or domestic markets, or change in the existing
financial, political or economic conditions in the United States or elsewhere,
if the effect of any such event specified in this clause (iv) makes it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Shares in the manner contemplated in the Prospectus; or (v) the
enactment, publication, decree, or other promulgation of any federal or state
statute, regulation, rule, or order of any court or other governmental
authority, or the taking of any action by any federal, state or local government
or agency in respect of fiscal or monetary affairs, if the effect of any such
event specified in this clause (v) in your reasonable judgment makes it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Shares in the manner contemplated in the Prospectus.

    (k) You shall have received certificates, dated the Closing Date (and, if
applicable, the Option Closing Date) and signed by the President and the Chief
Financial Officer of the Company stating that (i) they have carefully examined
the Registration Statement and the Prospectus as amended or supplemented and
nothing has come to their attention that would lead them to believe that either
the Registration Statement or the Prospectus, or any amendment or supplement
thereto as of their respective effective or issue dates, contained, and the
Prospectus as amended or supplemented at such Closing Date, contains any untrue
statement of a material fact, or omits to state a material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they were made, not misleading, and, that (ii) all
representations and warranties made herein by the Company are true and correct
in all material respects at such Closing Date, with the same effect as if made
on and as of such

                                       14
<PAGE>
 
Closing Date, and all agreements herein to be performed by the Company on or
prior to such Closing Date have been duly performed in all material respects.

    (l) You shall have received a certificate, dated the Closing Date (and, if
applicable, the Option Closing Date) and signed by the Selling Shareholders, to
the effect that all representations and warranties made herein by the Selling
Shareholders are true and correct in all material respects at such Closing Date,
with the same effect as if made on and as of such Closing Date, and all
agreements herein to be performed by the Selling Shareholders on or prior to
such Closing Date have been duly performed in all material respects.

    (m) The Company and each of the Selling Shareholders shall not have failed,
refused, or been unable, at or prior to the Closing Date (and, if applicable,
the Option Closing Date) to have performed in all material respects any
agreement on their part to be performed or any of the conditions herein
contained and required to be performed or satisfied by them at or prior to such
Closing Date.

    (n) The Shares shall have been approved for trading upon official notice of
issuance on NASDAQ.

    All such opinions, certificates, letters and documents will be in compliance
with the provisions hereof only if they are reasonably satisfactory to you and
to Gardere & Wynne, L.L.P., counsel for the several Underwriters.  The Company,
Goodrich and Selling Shareholders will furnish you with such conformed copies of
such opinions, certificates, letters and documents as you may request.

    If any of the conditions specified above in this Section 6 shall not have
been satisfied at or prior to the Closing Date (and, if applicable, the Option
Closing Date) or waived by you in writing, this Agreement may be terminated by
you on notice to the Company and the Selling Shareholders.

    7.    Indemnification.  (a)  The Company will indemnify and hold harmless
each Underwriter and each person, if any, who controls any Underwriter within
the meaning of the Act, against any losses, claims, damages, liabilities (or
actions in respect thereof), joint or several, to which such Underwriter or such
controlling person may become subject, under the Act or otherwise, insofar as
such losses, claims, damages, liabilities or actions arise out of or are based
upon an untrue statement or alleged untrue statement of a material fact
contained in the Registration Statement, any Preliminary Prospectus, the
Prospectus, or any amendment or supplement thereto, or in any blue sky
application or other document executed by the Company or based on any
information furnished in writing by the Company, filed in any jurisdiction in
order to qualify any or all of the Shares under the securities laws thereof
("Blue Sky Application"), or arise out of or are based upon the omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading; and will reimburse each Underwriter and
each such controlling person for any reasonable legal or other expenses
reasonably incurred by such Underwriter or such controlling person in connection
with investigating or defending any such loss, claim, damage, liability or
action; provided, however, that the Company shall not be liable in any such case
to the extent that any such loss, claim, damage, liability or action arises out
of or is based upon an untrue statement or alleged untrue statement or omission
or alleged omission made in the Registration Statement, such Preliminary
Prospectus or the Prospectus, or such amendment or supplement, or any Blue Sky
Application in reliance upon and in conformity with written information
furnished to the Company by you or by any Underwriter through you, or by any
Selling Shareholder, specifically for use in the preparation thereof; and
provided, further, that if any Preliminary Prospectus or the Prospectus
contained any alleged untrue statement or allegedly omitted to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading and such statement or omission shall have been corrected
in a revised Preliminary Prospectus or in the Prospectus or in an amended or
supplemented Prospectus, the Company shall not be liable to any Underwriter or
controlling person under this subsection (a) with respect to such alleged untrue
statement or alleged omission to the extent that any such loss, claim, damage,
liability or action of such Underwriter or controlling person results from the
fact that such Underwriter sold Shares to a person to whom there was not sent or
given, at or prior to the written confirmation of such sale, such revised
Preliminary Prospectus or Prospectus or amended or supplemented Prospectus.
This indemnity agreement shall be in addition to any liabilities which the
Company may

                                       15
<PAGE>
 
otherwise have.  Notwithstanding the foregoing, the obligations of the Company
pursuant to this subsection (a) shall be limited to the Net Proceeds (as
hereinafter defined) received by the Company.  Net Proceeds shall mean any and
all amounts of net proceeds from the offering (before deducting expenses) of the
Shares.

    (b)  Goodrich will indemnify and hold harmless each Underwriter and each
person, if any, who controls any Underwriter within the meaning of the Act,
against any losses, claims, damages, liabilities or actions in respect thereof,
joint or several, to which such Underwriter or such controlling person may
become subject, under the Act or otherwise, insofar as such losses, claims,
damages, liabilities or actions arise out of or are based upon an untrue
statement or alleged untrue statement of a material fact contained in the
Registration Statement, any Preliminary Prospectus, the Prospectus, or any
amendment or supplement thereto, or in any Blue Sky Application, or arise out of
or are based upon the omission or alleged omission to state therein a material
fact required to be stated therein or necessary to make the statements therein,
in light of the circumstances under which they were made, not misleading; and
will reimburse each Underwriter and each such controlling person for any
reasonable legal or other expenses reasonably incurred by such Underwriter or
such controlling person in connection with investigating or defending any such
loss, claim, damage, liability or action; provided, however, that Goodrich shall
not be liable in any such case to the extent that any such loss, claim, damage,
liability or action arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in the
Registration Statement, such Preliminary Prospectus or the Prospectus, or such
amendment or supplement, or any Blue Sky Application in reliance upon and in
conformity with written information furnished to the Company by you or by any
Underwriter through you, or by any other Selling Shareholder, specifically for
use in the preparation thereof; and provided, further, that if any Preliminary
Prospectus or the Prospectus contained any alleged untrue statement or allegedly
omitted to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading and such statement or
omission shall have been corrected in a revised Preliminary Prospectus or in the
Prospectus or in an amended or supplemented Prospectus, Goodrich shall not be
liable to any Underwriter or controlling person under this subsection (b) with
respect to such alleged untrue statement or alleged omission to the extent that
any such loss, claim, damage or liability of such Underwriter or controlling
person results from the fact that such Underwriter sold Shares to a person to
whom there was not sent or given, at or prior to the written confirmation of
such sale, such revised Preliminary Prospectus or Prospectus or amended or
supplemented Prospectus. This indemnity agreement shall be in addition to any
liabilities which Goodrich may otherwise have.  Notwithstanding the foregoing,
the obligations of Goodrich pursuant to this subsection (b) shall be limited to
the Net Proceeds received by Goodrich and the Company, collectively, for the
Shares.

    (c) DTM Holdings and Dr. Beaman will indemnify and hold harmless each
Underwriter and each person, if any, who controls any Underwriter within the
meaning of the Act, against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter or controlling person may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon any
untrue statement or alleged untrue statement of any material fact contained in
the Registration Statement, any Preliminary Prospectus, the Prospectus, or any
amendment or supplement thereto, or any Blue Sky Application or arise out of or
are based upon the omission or the alleged omission to state therein a material
fact required to be stated therein or necessary to make the statements therein
not misleading, in each case to the extent, but only to the extent, that such
untrue statement or alleged untrue statement or omission or alleged omission was
made in the Registration Statement, such Preliminary Prospectus or the
Prospectus, or such amendment or supplement, or any Blue Sky Application, in
reliance upon and in conformity with written information furnished to the
Company or any Underwriter by DTM Holdings or Dr. Beaman specifically for use in
the preparation thereof; and will reimburse any reasonable legal or other
expenses reasonably incurred by each Underwriter and each person, if any, who
controls any Underwriter within the meaning of the Act, in connection with
investigating or defending any such loss, claim, damage, liability or action;
provided, however, that the indemnity contained in this subsection (c) with
respect to any Preliminary Prospectus shall not inure to the benefit of any
Underwriter (or to the benefit of any person controlling such Underwriter) in
respect of any action or claim asserted by a person who purchased any Shares
from such Underwriter, if, within the time required by the Act such person was
not sent or given a copy of the Prospectus, as then amended or supplemented.
This indemnity agreement shall be in addition to any liabilities which DTM
Holdings

                                       16
<PAGE>
 
or Dr. Beaman may otherwise have.  Notwithstanding the foregoing, the
obligations of each of DTM Holdings and Dr. Beaman pursuant to this subsection
(c) shall be limited to the Net Proceeds received by it or him for the Shares.

    (d) Each Underwriter will indemnify and hold harmless the Company, each of
its directors, each of its officers who have signed the Registration Statement,
Goodrich, and each other person, if any, who controls the Company within the
meaning of the Act, and each Selling Shareholder, against any losses, claims,
damages or liabilities, joint or several, to which the Company or any such
director or officer, Goodrich or other controlling person or any such Selling
Shareholder may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon any untrue statement or alleged untrue statement of any
material fact contained in the Registration Statement, any Preliminary
Prospectus, the Prospectus, any amendment or supplement thereto, or any Blue Sky
Application or arise out of or are based upon the omission or the alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading, in each case to the extent, but only to
the extent, that such untrue statement or alleged untrue statement or omission
or alleged omission was made in the Registration Statement, such Preliminary
Prospectus or the Prospectus, such amendment or supplement, or any Blue Sky
Application in reliance upon and in conformity with written information
furnished to the Company by any such Underwriter specifically for use in the
preparation thereof; and will reimburse any reasonable legal or other expenses
reasonably incurred by the Company or any such director or officer, Goodrich or
other controlling person or any such Selling Shareholder in connection with
investigating or defending any such loss, claim, damage, liability or action.
This indemnity agreement shall be in addition to any liabilities which the
Underwriters may otherwise have.  Notwithstanding the foregoing, the obligations
of each Underwriter pursuant to this subsection (d) shall be limited to the
underwriting discounts and commissions applicable to the Shares purchased by
each such Underwriter.

    (e) Any party which proposes to assert the right to be indemnified under
this Section 7 shall, within ten days after receipt of notice of commencement of
any action, suit or proceeding against such party in respect of which a claim is
to be made against an indemnifying party under this Section 7, notify each such
indemnifying party of the commencement of such action, suit or proceeding,
enclosing a copy of all papers served, but the omission so to notify such
indemnifying party of any such action, suit or proceeding shall not relieve such
indemnifying party from any liability which it may have to any indemnified party
otherwise than under this Section 7, except to the extent the indemnifying party
is actually prejudiced thereby. In case any such action, suit or proceeding
shall be brought against any indemnified party and it shall notify the
indemnifying party of the commencement thereof, the indemnifying party shall be
entitled to participate in and, to the extent that it shall wish, jointly with
any other indemnifying party similarly notified, to assume the defense thereof,
with counsel reasonably satisfactory to such indemnified party, and after notice
from the indemnifying party to such indemnified party of its election so to
assume the defense thereof, the indemnifying party shall not be liable to such
indemnified party for any reasonable legal or other expenses, other than
reasonable costs of investigation, subsequently incurred by such indemnified
party in connection with the defense thereof. The indemnified party shall have
the right to employ its own counsel in any such action, but the fees and
expenses of such counsel shall be at the expense of such indemnified party
unless (i) the employment of counsel by such indemnified party at the expense of
the indemnifying party has been authorized by the indemnifying party, (ii) the
indemnified party shall have been advised by such counsel in a written opinion
that there may be a conflict of interest between the indemnifying party and the
indemnified party in the conduct of the defense, or certain aspects of the
defense, of such action (in which case the indemnifying party shall not have the
right to direct the defense of such action with respect to those matters or
aspects of the defense on which a conflict exists or may exist on behalf of the
indemnified party) or (iii) the indemnifying party shall not in fact have
employed counsel to assume the defense of such action, in any of which events
such fees and expenses to the extent applicable shall be borne by the
indemnifying party. An indemnifying party shall not be liable for any settlement
of any action or claim effected without its consent. Each indemnified party, as
a condition of such indemnity, shall cooperate in good faith with the
indemnifying party in the defense of any such action or claim.

    (f) If the indemnification provided for in this Section 7 is, for any reason
other than pursuant to the terms thereof, judicially determined (by the entry of
a final judgment or decree by a court of competent jurisdiction

                                       17
<PAGE>
 
and the expiration of time to appeal or the denial of the last right to appeal)
to be unavailable to an indemnified party under subsections (a), (b), (c) or (d)
above in respect of any losses, claims, damages or liabilities (or actions in
respect thereof) referred to therein, then each indemnifying party shall, in
lieu of indemnifying such indemnified party, contribute to the amount paid or
payable by such indemnified party as a result of such losses, claims, damages or
liabilities (or actions in respect thereof) in such proportion as is appropriate
to reflect the relative benefits received by the Company, the Selling
Shareholders and the Underwriters from the offering of the Shares.  For purposes
of this subsection (f), all benefits received by the Company shall be deemed to
have been received jointly by the Company and Goodrich.  If, however, the
allocation provided by the immediately preceding sentences is not permitted by
applicable law, then each indemnifying party shall contribute to such amount
paid or payable by such indemnified party in such proportion as is appropriate
to reflect not only such relative benefits but also the relative fault, as
applicable, of the Company, Goodrich, the Selling Shareholders and the
Underwriters in connection with the statements or omissions which resulted in
such losses, claims, damages or liabilities (or actions in respect thereof), as
well as other relevant equitable considerations. The relative benefits received
by, as applicable, the Company, the Selling Shareholders and the Underwriters
shall be deemed to be in the same proportion as the total net proceeds from the
offering (before deducting expenses) received by the Company and the Selling
Shareholders bear to the total underwriting discounts and commissions received
by the Underwriters, in each case as set forth in the table on the cover page of
the Prospectus. The relative fault shall be determined by reference to, among
other things, whether the untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Company, Goodrich, the Selling Shareholders or the Underwriters and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.  The Company, Goodrich, the Selling
Shareholders and the Underwriters agree that it would not be just and equitable
if contributions pursuant to this subsection (f) were determined by pro rata
allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to above in this subsection (f). The amount
paid or payable by an indemnified party as a result of the losses, claims,
damages or liabilities (or actions in respect thereof) referred to above in this
subsection (f) shall be deemed to include any reasonable legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim.  Notwithstanding the foregoing, (i) the
obligations of the Company pursuant to this subsection (f) shall be limited to
the Net Proceeds received by the Company for Shares, (ii) the obligations of
Goodrich pursuant to this subsection (f) shall be limited to the Net Proceeds
received by Goodrich and the Company, collectively, for the Shares and (iii) the
obligations of each of DTM Holdings and Dr. Beaman pursuant to this subsection
(f) shall be limited to the Net Proceeds received by it or him for the Shares.
Notwithstanding the provisions of this subsection (f), no Underwriter shall be
required to contribute any amount in excess of the underwriting discounts and
commissions applicable to the Shares purchased by such Underwriter. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Act) shall be entitled to contribution from any person who was not guilty of
such fraudulent misrepresentation. The Underwriters' obligations in this
subsection (f) to contribute are several in proportion to their respective
underwriting obligations and not joint.

    8.    Representations and Agreements to Survive Delivery.  All
representations, warranties, and agreements of the Company and the Selling
Shareholders contained herein, including but not limited to those contained in
Sections 7 and 11 herein or in certificates delivered pursuant hereto, all the
representations, warranties, and agreements of Goodrich contained herein,
including but not limited to those contained in Section 7 hereof or in
certificates delivered pursuant hereto, and the agreements of the Underwriters
contained herein, including but not limited to those contained in Section 7
hereof, shall remain operative and in full force and effect regardless of any
termination or cancellation of this Agreement or any investigation made by or on
behalf of any Underwriter or any controlling person, the Company or any of its
officers, directors or any controlling persons, or the Selling Shareholders, and
shall survive delivery of the Shares to the Underwriters hereunder until barred
by applicable statutes of limitation with respect thereto.

    9.    Substitution of Underwriters. (a) If any Underwriter shall default in
its obligation to purchase the Shares which it has agreed to purchase hereunder,
you may in your discretion arrange for you or another party or other parties to
purchase such Shares on the terms contained herein. If within thirty-six hours
after such default

                                       18
<PAGE>
 
by any Underwriter you do not arrange for the purchase of such Shares, then the
Company and the Selling Shareholders shall be entitled to a further period of
thirty-six hours within which to procure another party or parties reasonably
satisfactory to you to purchase such Shares on such terms.  In the event that,
within the respective prescribed periods, you notify the Company and the Selling
Shareholders that you have so arranged for the purchase of such Shares, or the
Company and the Selling Shareholders notify you that they have so arranged for
the purchase of such Shares, you or the Company and the Selling Shareholders
shall have the right to postpone the Closing Date for a period of not more than
seven days, in order to effect whatever changes may thereby be made necessary in
the Registration Statement or the Prospectus, or in any other documents or
arrangements, and the Company agrees to file promptly any amendments to the
Registration Statement or the Prospectus which in your opinion may thereby be
made necessary. The term "Underwriter" as used in this Agreement shall include
any persons substituted under this Section 9 with like effect as if such person
had originally been a party to this Agreement with respect to such Shares.

    (b) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters made by you or the Company
and the Selling Shareholders as provided in subsection (a) above, the aggregate
number of Shares which remains unpurchased does not exceed one tenth of the
total Shares to be sold on the Closing Date, then the Company and the Selling
Shareholders shall have the right to require each non-defaulting Underwriter to
purchase the Shares which such Underwriter agreed to purchase hereunder and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

    (c) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters made by you or the Company
and the Selling Shareholders as provided in subsection (a) above, the number of
Shares which remains unpurchased exceeds one tenth of the total Shares to be
sold on the Closing Date, or if the Company and the Selling Shareholders shall
not exercise the right described in subsection (b) above to require the non-
defaulting Underwriters to purchase Shares of the defaulting Underwriter or
Underwriters, then this Agreement shall thereupon terminate, without liability
on the part of any non-defaulting Underwriter or the Company and the Selling
Shareholders except for the expenses to be borne by the Company and the
Underwriters as provided in Section 11 hereof and the indemnity and contribution
agreements in Section 7 hereof; but nothing herein shall relieve a defaulting
Underwriter from liability for its default.

    10.   Effective Date and Termination. (a) This Agreement shall become
effective at 1:00 p.m., St. Louis time, on the first business day following the
effective date of the Registration Statement, or at such earlier time after the
effective date of the Registration Statement as you in your discretion shall
first release the Shares for offering to the public; provided, however, that the
provisions of Sections 7 and 11 shall at all times be effective. For the
purposes of this Section 10(a), the Shares shall be deemed to have been released
to the public upon release by you of the publication of a newspaper
advertisement relating to the Shares or upon release of telegrams, facsimile
transmissions or letters offering the Shares for sale to securities dealers,
whichever shall first occur.

    (b) This Agreement may be terminated by you at any time before it becomes
effective in accordance with Section 10(a) by notice to the Company, Goodrich
and the Selling Shareholders; provided, however, that the provisions of this
Section 10 and of Section 7 and Section 11 hereof shall at all times be
effective. In the event of any termination of this Agreement pursuant to Section
9 or this Section 10(b) hereof, the Company, Goodrich and the Selling
Shareholders shall not then be under any liability to any Underwriter except as
provided in Section 7 or Section 11 hereof.

    (c) This Agreement may be terminated by you at any time at or prior to the
Closing Date by notice to the Company and the Selling Shareholders if any
condition specified in Section 6 hereof shall not have been satisfied on or
prior to the Closing Date. Any such termination shall be without liability of
any party to any other party except as provided in Sections 7 and 11 hereof.

                                       19
<PAGE>
 
    (d) This Agreement also may be terminated by you, by notice to the Company
and the Selling Shareholders, as to any obligation of the Underwriters to
purchase the Option Shares, if any condition specified in Section 6 hereof shall
not have been satisfied at or prior to the Option Closing Date or as provided in
Section 9 of this Agreement.

    If you terminate this Agreement as provided in Sections 10(b), 10(c) or
10(d), you shall notify the Company and the Selling Shareholders by telephone or
telegram, confirmed by letter.

    11.   Costs and Expenses. The Company and the Selling Shareholders will bear
and pay the costs and expenses incident to the registration of the Shares and
public offering thereof, including, without limitation, (a) the fees and
expenses of the Company's accountants and the fees and expenses of counsel for
the Company, (b) the preparation, printing, filing, delivery and shipping of the
Registration Statement, each Preliminary Prospectus, the Prospectus and any
amendments or supplements thereto (except as otherwise expressly provided in
Section 5(d) hereof) and the printing, delivery and shipping of this Agreement,
the Agreement Among Underwriters, the Selected Dealer Agreement, Underwriters'
Questionnaires and Powers of Attorney and Blue Sky Memoranda, (c) the furnishing
of copies of such documents (except as otherwise expressly provided in Section
5(d) hereof) to the Underwriters, (d) the registration or qualification of the
Shares for offering and sale under the securities laws of the various states,
including the reasonable fees and disbursements of Underwriters' counsel
relating to such registration or qualification, (f) the fees payable to the NASD
and the Commission in connection with their review of the proposed offering of
the Shares, (f) all printing and engraving costs related to preparation of the
certificates for the Shares, including transfer agent and registrar fees, 
(g) all initial transfer taxes, if any, (h) all fees and expenses relating to
the authorization of the Shares for trading on NASDAQ, (i) all travel expenses,
including air fare and accommodation expenses, of representatives of the Company
in connection with the offering of the Shares and (j) all of the other costs and
expenses incident to the performance by the Company of the registration and
offering of the Shares; provided, however, that the Underwriters will bear and
pay the fees and expenses of the Underwriters' counsel (other than fees and
disbursements relating to the registration or qualification of the Shares for
offering and sale under the securities laws of the various states), the
Underwriters' out-of-pocket expenses, and any advertising costs and expenses
incurred by the Underwriters incident to the public offering of the Shares; and
provided, further, that the Selling Shareholders will bear and pay the fees and
expenses of the Selling Shareholders' counsel.

    If this Agreement is terminated by you in accordance with the provisions of
Section 10(c), the Company shall reimburse the Underwriters for all of their
out-of-pocket expenses, including the reasonable fees and disbursements of
counsel to the Underwriters.

    12.   Default of Selling Shareholders.  Failure or refusal by any of the
Selling Shareholders to sell and deliver on the Closing Date the Shares agreed
to be sold and delivered by such Selling Shareholder shall in no manner relieve
the other Selling Shareholders or the Company of their respective obligations
under this Agreement. If any Selling Shareholder should fail or refuse to sell
and deliver his Shares, the remaining Selling Shareholders shall have the right
hereby granted to increase, pro rata or otherwise, the number of Shares to be
sold by them hereunder to the total number of Shares to be sold by all Selling
Shareholders as set forth in Schedule I. If the remaining Selling Shareholders
do not fully exercise the right to increase the number of Shares to be sold by
them, the Underwriters, at your option, will have the right to elect to purchase
or not to purchase the Shares to be sold by the Company and the remaining
Selling Shareholders. In the event the Underwriters purchase the Shares of the
Company and such other Selling Shareholders pursuant to this Section 12, the
Closing Date shall be postponed for a period of not more than seven days in
order that the Registration Statement and Prospectus or other documents may be
amended or supplemented to the extent necessary under the provisions of the Act
and the Rules and Regulations or under the securities laws of any jurisdiction.
If the Underwriters determine not to purchase the Shares of the Company and the
other Selling Shareholders, if any, this Agreement shall terminate and neither
the Company nor the Underwriters nor any other Selling Shareholder shall be
under any obligation under this Agreement except as provided in Section 7 hereof
and except for the obligation of the Company to pay for such expenses as are set
forth in Section 11 hereof. Nothing herein shall relieve a defaulting Selling
Shareholder from liability for his default or from liability under Section 7
hereof or for expenses imposed by this Agreement upon such Selling Shareholder.

                                       20
<PAGE>
 
    13.  Notices.  All notices or communications hereunder, except as herein
otherwise specifically provided, shall be in writing and if sent to the
Underwriters shall be mailed, delivered, sent by facsimile transmission, or
telegraphed and confirmed c/o A. G. Edwards & Sons, Inc. at One North Jefferson
Avenue, St. Louis, Missouri 63103, Attention: Syndicate, facsimile number (314)
955-7387, with a copy to Gardere & Wynne, L.L.P., 1601 Elm Street, Suite 3000,
Dallas, Texas 75201, Attention: John T. Kipp, facsimile number (214) 999-4667;
or if sent to the Company shall be mailed, delivered, sent by facsimile
transmission, or telegraphed and confirmed to the Company at 1611 Headway
Circle, Building 2, Austin, Texas 78754, Attention: Chief Executive Officer,
facsimile number (512) 339-0634, with a copy to Goodrich at 4020 Kinross Lakes
Parkway, Richfield, Ohio 44286-9368, Attention: Legal Department, facsimile
number (216) 659-7713; or if sent to Goodrich shall be mailed, delivered, sent
by facsimile transmission, or telegraphed and confirmed to Goodrich at 4020
Kinross Lakes Parkway, Richfield, Ohio 44286-9368, Attention: Legal Department,
facsimile number (216) 659-7713; or if sent to any Selling Shareholder shall be
mailed, delivered, sent by facsimile transmission or telegraphed and confirmed
to such Selling Shareholder, to the Attorneys-in-Fact at 1611 Headway Circle,
Building 2, Austin, Texas 78754, Attention D. Lee Tobler and Uday Bellary.
Notice to any Underwriter pursuant to Section 7 shall be mailed, delivered, sent
by facsimile transmission, or telegraphed and confirmed to such Underwriter's
address as it appears in the Underwriters' Questionnaire furnished in connection
with the offering of the Shares or as otherwise finished to the Company and the
Selling Shareholder.

    14.   Parties.  This Agreement shall inure to the benefit of and be binding
upon the Underwriters, the Selling Shareholders, and the Company and Goodrich
and their respective successors and assigns. Nothing expressed or mentioned in
this Agreement is intended or shall be construed to give any person, corporation
or other entity, other than the parties hereto and their respective successors
and assigns and the controlling persons, officers and directors referred to in
Section 7, any legal or equitable right, remedy or claim under or in respect of
this Agreement or any provision herein contained; this Agreement and all
conditions and provisions hereof being intended to be and being for the sole and
exclusive benefit of the parties hereto and their respective successors and
assigns and said controlling persons and said officers and directors, and for
the benefit of no other person, corporation or other entity. No purchaser of any
of the Shares from any Underwriter shall be construed a successor or assign by
reason merely of such purchase.

    In all dealings with the Company, Goodrich and the Selling Shareholders
under this Agreement you shall act on behalf of each of the several
Underwriters; and the Company, Goodrich, and the Selling Shareholders shall be
entitled to act and rely upon any statement, request, notice or agreement on
behalf of the Underwriters, made or given by you on behalf of the Underwriters,
as if the same shall have been made or given in writing by the Underwriters.

    15.   Counterparts.  This Agreement may be executed by any one or more of
the parties hereto in any number of counterparts, each of which shall be deemed
to be an original, but all such counterparts shall together constitute one and
the same instrument.

    16.   Pronouns.  Whenever a pronoun of any gender or number is used herein,
it shall, where appropriate, be deemed to include any other gender and number.

    17.   Applicable Law.  This Agreement shall be governed by, and construed in
accordance with, the laws of the State of Missouri.

                                       21
<PAGE>
 
    If the foregoing is in accordance with your understanding, please so
indicate in the space provided below for that purpose, whereupon this letter
shall constitute a binding agreement among the Company, Goodrich, each of the
Selling Shareholders and the Underwriters.
 
                                 DTM CORPORATION


                                 By:
                                    -----------------------------------------
                                 Title:
                                       --------------------------------------


                                 THE B.F. GOODRICH COMPANY


                                 By:
                                    -----------------------------------------
                                 Title:
                                       --------------------------------------


                                 Selling Shareholders Named in Schedule I Hereto


                                 By:
                                    -----------------------------------------
                                           Attorney-in-Fact

 



Accepted in St. Louis,
Missouri as of the date
first above written, on
behalf of ourselves and each
of the several Underwriters
named in Schedule II hereto.

A. G. EDWARDS & SONS, INC.
LADENBURG THALMANN & CO. INC.

By: A.G. EDWARDS & SONS, INC.


By:
   -------------------------------
Title:  Vice President

                                       22
<PAGE>
 
                                   SCHEDULE I

<TABLE>
<CAPTION>
                                                                       
                                                                      Number of
Selling Shareholder                                                  Firm Shares
- -------------------                                                  -----------
<S>                                                                    <C>
DTM Holdings Ltd...................................................    249,467
Dr. Joseph J. Beaman...............................................      3,285
    Total                                                              252,752
                                                                       -------
</TABLE>

                                       23
<PAGE>
 
                                  SCHEDULE II

<TABLE> 
<CAPTION> 

Name                                                           Number of Shares
- ----                                                           ----------------
<S>                                                             <C> 
A. G. Edwards & Sons, Inc....................................
Ladenburg Thalmann & Co. Inc.................................



                                                                 Total
                                                                      =========
</TABLE> 

<PAGE>
 
                                  SCHEDULE III

    Pursuant to Section 6(g) of the Underwriting Agreement, Ernst & Young LLP
shall furnish letters to the Underwriters to the effect that:

          (i)   They are independent certified public accountants with respect
to the Company and its subsidiary within the meaning of the Act and the
applicable Rules and Regulations thereunder.

          (ii)  In their opinion, the financial statements and any supplementary
financial information and schedules audited (and, if applicable, prospective
financial statements and/or pro forma financial information examined) by them
and included in the Prospectus or the Registration Statement comply as to form
in all material respects with the applicable accounting requirements of the Act
and the applicable Rules and Regulations thereunder; and, if applicable, they
have made a review in accordance with standards established by the American
Institute of Certified Public Accountants of the unaudited consolidated interim
financial statements, selected financial data, pro forma financial information,
prospective financial statements and/or condensed financial statements derived
from audited financial statements of the Company for the periods specified in
such letter, as indicated in their reports thereon, copies of which have been
furnished to the Representatives of the Underwriters (the "Representatives").

          (iii) On the basis of limited procedures, not constituting an audit
in accordance with generally accepted auditing standards, consisting of a
reading of the unaudited financial statements and other information referred to
below, performing the procedure specified by the AICPA for a review of interim
financial information as discussed in SAS No. 71, Interim Financial Information,
on the latest available interim financial statements of the Company and its
subsidiary, inspection of the minute books of the Company and its subsidiary
since the date of the latest audited financial statements included in the
Prospectus, inquiries of officials of the Company and its subsidiary responsible
for financial and accounting matters and such other inquiries and procedures as
may be specified in such letter, nothing came to their attention that caused
them to believe that:

                (A) any material modifications should be made to the unaudited
          statements of consolidated income, statements of consolidated
          financial position and statements of consolidated cash flows included
          in the Prospectus for them to be in conformity with generally accepted
          accounting principles, or the unaudited statements of consolidated
          income, statements of consolidated financial position and statements
          of consolidated cash flows included in the Prospectus do not comply as
          to form in all material respects with the applicable accounting
          requirements of the Act and the related published Rules and
          Regulations thereunder.

                (B) any other unaudited income statement data and balance sheet
          items included in the Prospectus do not agree with the corresponding
          items in the unaudited consolidated financial statements from which
          such data and items were derived, and any such unaudited data and
          items were not determined on a basis substantially consistent with the
          basis for the corresponding amounts in the audited consolidated
          financial statements included in the Prospectus.

                (C) the unaudited financial statements which were not included
          in the Prospectus but from which were derived any unaudited condensed
          financial statements referred to in Clause (A) and any unaudited
          income statement data and balance sheet items included in the
          Prospectus and referred to in Clause (B) were not determined on a
          basis substantially consistent with the basis for the audited
          consolidated financial statements included in the Prospectus.

                (D) any unaudited pro forma consolidated financial statements
          included in the Prospectus do not comply as to form in all material
          respects with the applicable accounting requirements of the Act and
          the published rules and regulations thereunder or the pro forma
          adjustments have not been properly applied to the historical amounts
          in the compilation of those statements.

<PAGE>
 
                (E) as of a specified date not more than five days prior to the
          date of such letter, there have been any changes in the consolidated
          capital stock or any increase in the consolidated long-term debt of
          the Company and its subsidiary, or any decreases in net current assets
          or net assets or other items specified by the Representatives, or any
          changes in any items specified by the Representatives, in each case as
          compared with amounts shown in the latest balance sheet included in
          the Prospectus, except in each case for changes, increases or
          decreases which the Prospectus discloses have occurred or may occur or
          which are described in such letter.

                (F) for the period from the date of the latest financial
          statements included in the Prospectus to the specified date referred
          to in Clause (E) there were any decreases in consolidated net revenues
          or operating profit or the total or per share amounts of consolidated
          net income or any other changes in any other items specified by the
          Representatives, in each case as compared with the comparable period
          of the preceding year and with any other period of corresponding
          length specified by the Representatives, except in each case for
          changes, decreases or increases which the Prospectus discloses have
          occurred or may occur or which are described in such letter.

          (iv)  In addition to the audit referred to in their report(s) included
in the Prospectus and the limited procedures, inspection of minute books,
inquiries and other procedures referred to in paragraph (iii) above, they have
carried out certain specified procedures, not constituting an audit in
accordance with generally accepted auditing standards, with respect to certain
amounts, percentages and financial information specified by the Representatives,
which are derived from the general accounting records of the Company and its
subsidiary for the periods covered by their reports and any interim or other
periods since the latest period covered by their reports, which appear in the
Prospectus, or in Part II of, or in exhibits and schedules to, the Registration
Statement specified by the Representatives, and have compared certain of such
amounts, percentages and financial information with the accounting records of
the Company and its subsidiary and have found them to be in agreement.


<PAGE>
 
                                                                     EXHIBIT 4.1



                            INCORPORATED UNDER THE
                          LAWS OF THE STATE OF TEXAS

NUMBER                                                                 SHARES

C

COMMON STOCK                    DTM CORPORATION                CUSIP 23333L 10 3


THIS CERTIFIES THAT ___________________________________________ IS THE RECORD 
HOLDER OF _________________________________ FULLY PAID AND NON-ASSESSABLE 
SHARES OF COMMON STOCK, PAR VALUE OF $.0002 PER SHARE, OF

                                DTM CORPORATION

(herein called the "Corporation") transferable on the books of the Corporation
by the holder hereof, in person or by duly authorized attorney, upon surrender 
of this Certificate properly endorsed or accompanied by a proper assignment.  
This Certificate and the shares represented hereby are Issued under and shall be
subject to all of the provisions of the Articles of Incorporation and the Bylaws
of the Corporation, and all amendments thereto, copies of which are on file at 
the principal office of the Corporation and the Transfer Agent, to all of which 
the holder of this Certificate, by acceptance hereof, assents.  This Certificate
is not valid unless countersigned by the Transfer Agent and registered by the 
Registrar of the Corporation.

     IN WITNESS WHEREOF, the Corporation has caused the facsimile signatures of 
its duly authorized officers and its facsimile seal to be hereunto affixed.

                                       Dated:

                                       COUNTERSIGNED AND REGISTERED:

                                       CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

     PRESIDENT                         TRANSFER AGENT AND REGISTRAR

                                       BY

     SECRETARY                                 AUTHORIZED SIGNATURE

<PAGE>
 
                                                                    EXHIBIT 10.3

                              THE DTM CORPORATION

                           MANAGEMENT INCENTIVE PLAN
                           -------------------------
            (Restated to Reflect Amendment as of January 28, 1997)

PURPOSE
- -------

The DTM Management Incentive Plan (the Plan) has been established to provide
opportunities to certain key management personnel to receive incentive
compensation as a reward for high levels of personal performance above the
ordinary performance standards compensated by base salary.  The Plan is designed
to provide a competitive level of rewards when all relevant performance
objectives are achieved.

ELIGIBILITY
- -----------

Participation in the Plan will be limited to those key executives that have the
potential to influence significantly and positively the performance of the
Company.  Participants will be selected by management annually.  Inclusion of a
key manager as a participant does not, however, assure that an incentive award
will be paid to the participant for the year since actual awards are determined
at the sole discretion of management.

To be eligible for participation in a particular year, a key manager must have
assumed the duties of an incentive-eligible position and have been selected for
participation in the Plan by the date which is at least three months prior to
the beginning of the Plan Year.  Incentive awards for participants who become
eligible for the Plan, other than at the beginning of the Plan Year, will be
paid pro rata based on a fraction, the numerator of which is the number of full
and partial months of the Plan Year during which the person was a Participant in
the Plan, and the denominator of which is the total number of months in the Plan
Year.

PARTICIPANT CATEGORIES
- ----------------------

Each participant will be assigned each year to an incentive category based on
organizational level and potential impact on important Company results.  The
participant categories define the target level of incentive opportunity, stated
as a percentage of base salary, that will be available to the participant.
Category assignments are approved by the Chief Executive Officer.  The category
assignment for the Chief Executive Officer shall be approved by the Compensation
Committee.
<PAGE>
 
The DTM Corporation Management Incentive Plan                             Page 2


                         EXECUTIVE INCENTIVE CATEGORIES
                         ------------------------------


<TABLE> 
<CAPTION> 
                   Target Bonus Percentage          Position
 Category           (As % of Base Salary)         Eligibility
 ---------          ---------------------         ------------
 <S>               <C>                            <C>    
    A                 50%                       CEO

    B                 35%                       Vice Presidents

    C                 25%                       Directors

    D                 20%                       Directors/Other
</TABLE> 

PARTICIPANT TARGET BONUS
- ------------------------

The target bonus is the dollar amount of target level incentive opportunity for
each participant.  It is the product of the participant's annual base salary and
the target bonus percentage determined by his or her incentive category
designation.

MAXIMUM AND THRESHOLD AWARDS
- ----------------------------

Each participant will be assigned maximum and threshold award levels.  Maximum
award levels represent the maximum amount of incentive award that may be paid to
a participant for a Plan Year. Threshold award levels represent the minimum non-
zero amount of incentive award that will be paid to a participant.  Performance
below the level for which a threshold-level award is paid will earn no incentive
payments.

Each participant's maximum award level will be 150% of his or her target bonus.
Each participant's threshold award level will be 50% of his or her target bonus.

PERFORMANCE MEASURES
- --------------------

Performance measures that may be used under the Plan include Net Income, Pretax
Income, Consolidated Operating Income, Operating Income Return on Net Capital
Employed, Cash Flow, Working Capital, Return on Equity, Return on Assets, and
Earnings per Share of Common Stock of the Company for the Plan Year.
<PAGE>
 
The DTM Corporation Management Incentive Plan                          Page 3


PARTIAL PLAN YEAR PARTICIPATION
- -------------------------------

Subject to Compensation Committee approval, incentive awards to participants who
terminate during the Plan Year for reasons of death, disability, or normal or
early retirement will be calculated as specified herein and will be paid pro
rata based on a fraction, the numerator of which is the number of full and
partial months of the Plan Year during which the participant was employed by the
Company, and the denominator of which is the total number of months in the Plan
Year.  These payments will be made at the time that award payments are made to
all other participants.

Subject to the sole discretion of the Compensation Committee, participants who
terminate during a Plan Year for reasons other than death, disability, or normal
or early retirement may receive incentive award payments for such Plan Year on a
pro rata basis as described above.

PERFORMANCE GOALS
- -----------------

The Compensation Committee will designate at the beginning of each Plan Year:

     .    The performance measures to be used for the Plan Year;

     .    A schedule for each performance measure relating achievement levels
          for the performance measure to incentive award levels as a percentage
          of participants' target awards; and

     .    The relative weightings of the performance measures for the Plan year.


INCENTIVE POOLS
- ---------------

The total target incentive pool for DTM is equal to the sum of the individual
target bonuses for all DTM participants.  The total target incentive pool is
divided into generator pools -- one generator pool for each performance measure.
The weightings for each performance measure determine the target dollar amount
for each generator pool.
<PAGE>
 
The DTM Corporation Management Incentive Plan                             Page 4


POOL GENERATION
- ---------------

     Each generator pool will be funded according to performance against goals
     based on the following schedule:

<TABLE> 
<CAPTION> 
     Performance for                          Percent of Generator
     Generator Pool                                Pool Funded
     ---------------                          --------------------
     <S>                                      <C> 
     Below Threshold                                     0% 
     Performance                                          
                                                          
     Threshold Performance                              50%
     Funding Level                                        
                                                          
     Target Performance                                100%
     Funding Level (100% of Goal)                         
                                                          
     Maximum Funding Level                             150%
</TABLE> 

     The sum of the dollar amounts from each generator pool provides the total
     dollar amount from which participant bonus payments will be made.  Payment
     is limited to each pool maximum.


DETERMINATION OF PARTICIPANT BONUS AWARDS
- -----------------------------------------

     Participant bonus awards will be determined as follows based on each
     generator pool:

Participant's      Percentage       Percent of          Participant
   Target      X   Weighting    X   Generator     =     Bonus Earned
   Bonus           for Generator    Pool Funded         Based on Generator Pool
                                Pool                                


The participant bonuses earned based on each generator pool will be summed to
arrive at the participant's total bonus payment for the Plan year.  A
participant's total bonus payment may be further adjusted either up or down by
management or the Compensation Committee, in its sole discretion.
<PAGE>
 
The DTM Corporation Management Incentive Plan                            Page 5



PROVISIONS
- ----------

The Management Incentive Plan is a discretionary compensation plan.  While
performance is an important element in determining incentive under the Plan,
actual payments, if any, are made at the sole discretion of the Compensation
Committee.  No awards under the Plan are to be considered earned until received.

PLAN YEAR
- ---------

The Plan Year shall be the fiscal year of the Company.

PLAN ADMINISTRATION
- -------------------

The Plan will be administered by the Committee.  The Committee is empowered to
set preestablished performance targets, measure the results and determine the
amounts payable.



G.L. Habegger/bl
3/11/96

<PAGE>
 
                                                                    EXHIBIT 10.7
 
                      AMENDED, RESTATED AND SUBSTITUTED
                                PROMISSORY NOTE

$4,700,000                                                     February 17, 1997

          FOR VALUE RECEIVED, the undersigned, DTM CORPORATION, a Texas
corporation (the "Borrower") hereby promises to pay to the order of NATIONSBANK
                  --------                                                     
OF TEXAS, N.A., a national banking association, its successors or assigns (the
                                                                              
"Bank"), at its offices in Austin, Texas (or at such other place or places as
- -----                                                                        
the Bank may designate) the maximum principal amount of FOUR MILLION SEVEN
HUNDRED THOUSAND DOLLARS ($4,700,000), as such maximum amount is reduced
hereunder, or such lesser principal amount as may be borrowed and outstanding
hereunder from time to time on the earlier of (i) the last day of an Interest
Period or (iii) July 31, 1998 (as such date may be extended, if extended, from
time to time in the Bank's sole discretion, the "Maturity Date").
                                                 -------------   

          Advances (including conversions and extensions) shall be made from
time to time hereunder upon request of the Borrower not later than 11:00 a.m.
(Austin, Texas time) on the date of requested advance in the case of Prime
Loans, on the second business day prior to the requested advance in the case of
Adjusted CD Loans and on the third business day prior to the requested advance
in the case of Eurodollar Loans.  The terms of each advance shall be noted on
the schedule attached hereto, the terms of which shall be presumed correct
absent evidence of error; provided, however that any failure to make such
                          --------                                       
notation (or any inaccuracy in such notation) shall not limit or otherwise
affect the obligations of the Borrower hereunder.  The Bank's obligation to make
advances hereunder is subject to the condition that immediately prior to and
immediately after giving effect to any such advance (i) no Event of Default
hereunder, or event or condition which upon notice or lapse of time would
constitute an Event of Default, shall then exist and be continuing, and (ii) the
aggregate amount of advances outstanding hereunder shall not exceed the maximum
committed amount of this Note (as such maximum amount may be reduced from time
to time).  As used herein, "Interest Period" means a period of (i) 30, 60, 90 or
                            ---------------                                     
180 days duration, in the case of Adjusted CD Loans, (ii) one, two, three or six
months, duration, in the case of Eurodollar Loans, and (iii) such number of days
duration as the Borrower may request not to exceed 30 days, in the case of Prime
Loans; provided, however, that (A) each Interest Period which would otherwise
end on a day which is not a business day shall end on the next succeeding
business day unless, in the case of Eurodollar Loans, such succeeding business
day falls in the next calendar month and then in such case on the next preceding
business day and (B) no Interest Period shall extend beyond the Maturity Date.

          The principal amount of each advance shall be due and interest thereon
shall accrue as agreed upon and noted on the schedule attached.  This Note shall
bear interest on the outstanding balance hereunder at a per annum interest rate
equal to (i) the Adjusted Eurodollar Rate plus 5/8% (hereinafter advances which
bear interest based on the Adjusted Eurodollar Rate may be referred to as
                                                                         
"Eurodollar Loans"), (ii) the Adjusted CD Rate plus 5/8% (hereinafter advances
- -----------------                                                             
which bear interest based on the Adjusted CD Rate may be referred to as
                                                                       
"Adjusted CD Loans") or (iii) the Prime Rate (hereinafter advances which bear
- ------------------                                                           
interest based on the Prime Rate may be referred to as "Prime Loans"), as the
                                                        -----------          
Borrower may elect in accordance with the provisions hereof; provided, however,
                                                             --------          
that the interest rate applicable hereunder shall not exceed the Maximum Lawful
Rate (as hereafter defined).  Unless otherwise agreed, accrued interest with
respect to each such advance shall be payable in arrears on the last day of an
Interest Period for such advance, but in any event not less frequently than once
every 90 days.  Whenever a payment on this Note is stated to be due on a day
which is not a business day, such payment shall be made on the next succeeding
business day with interest accruing to the date of payment.  Interest hereunder
shall be computed on the basis of actual number of days elapsed over a year of
360 days, except for the Default Rate (as hereafter defined) which shall be
computed on the basis of actual number of days elapsed over a year of 365/366
days, as applicable.  Prepayments of fixed-rate advances (Adjusted CD Loans and
Eurodollar Loans) are not permitted prior to maturity of Interest Periods.  The
Borrower agrees to indemnify the Bank against all  reasonable losses, expenses
and liabilities sustained by the Bank on account of the Borrower (i) failing to
accept a fixed rate loan after notice to the Bank of its acceptance of any such
fixed rate loan and (ii) making a prepayment on a fixed rate loan prior to the
last day of an Interest period.  As used
<PAGE>
 
herein;  "Adjusted CD Rate" means for the respective Interest Period a per annum
          ----------------                                                      
interest rate equal to the sum of (a) the per annum rate obtained by dividing
(i) the rate of interest determined by the Bank to be the average (rounded
upward to the nearest whole multiple of 1/100 of 1% per annum, if such average
is not such a multiple) of the consensus bid rate determined by the Bank for the
bid rates per annum, at 9:00 A.M. (Austin, Texas time) (or as soon thereafter as
is practicable) on the first day of such Interest Period, of certificate of
deposit dealers of recognized standing selected by the Bank for the purchase at
face value of the Bank's certificates of deposit in an amount substantially
equal to the Adjusted CD Loan comprising part of such borrowing (including
extensions and renewals) and with a maturity equal to such Interest Period, by
(ii) a percentage equal to 100% minus the Adjusted CD Reserve Percentage (as
defined below) for such Interest Period, plus (b) the Assessment Rate (as
defined below) for such Interest Period;  "Adjusted CD Rate Reserve Percentage"
                                           ----------------------------------- 
for the Interest Period for each Adjusted CD Loan comprising part of the same
borrowing (including conversions, extensions and renewals) means the reserve
percentage applicable on the first day of such Interest Period under regulations
issued from time to time by the Board of Governors of the Federal Reserve System
(or any successor) for determining the maximum reserve requirement (including,
but not limited to, any emergency, supplemental or other marginal reserve
requirement) for a member bank of the Federal Reserve System in New York City
with deposits exceeding one billion dollars with respect to liabilities
consisting of or including (among other liabilities) U.S. dollar nonpersonal
time deposits in the United States with a maturity equal to such Interest
Period; "Assessment Rate" for the Interest Period for each Adjusted CD Loan
         ---------------                                                   
comprising part of the same borrowing (including conversions, extensions and
renewals) means the annual assessment rate estimated by the Bank on the first
day of such Interest Period for determining the then current annual assessment
payable by the Bank to the Federal Deposit Insurance Corporation (or any
successor) for insuring U.S. dollar deposits of the Bank in the United States;
"Adjusted Eurodollar Rate" means for the respective Interest Period, a per annum
 ------------------------                                                       
interest rate equal to the per annum rate obtained by dividing (a) the rate of
interest determined by the Bank to be the average (rounded upward to the nearest
whole multiple of 1/16 of 1% per annum, if such average is not such a multiple)
of the per annum rates at which deposits in U.S. dollars are offered to the Bank
in the interbank eurodollar market at 10:00 A.M. (Austin, Texas time) (or as
soon thereafter as is practicable), in each case two Business Days before the
first day of such Interest Period in an amount substantially equal to such
Eurodollar Loan and for a period equal to such Interest Period by (b) a
percentage equal to 100% minus the Adjusted Eurodollar Reserve Percentage for
such Interest Period; "Adjusted Eurodollar Rate Reserve Percentage" means the
                       ------------------------------------------- 
percentage applicable two Business Days before the first day of such Interest
Period under regulations issued from time to time by the Board of Governors of
the Federal Reserve System (or any successor) for determining the maximum
reserve requirement (including, without limitation, any emergency, supplemental
or other marginal reserve requirement) for the Bank with respect to liabilities
or assets consisting of or including eurocurrency liabilities, as such term is
defined in Regulation D (or with respect to any other category of liabilities
which includes deposits by reference to which the interest rate on Eurodollar
Loans is determined) having a term equal to the Interest Period for which such
Adjusted Eurodollar Reserve Percentage is determined; "Maximum Legal Rate" means
                                                       ------------------  
the maximum rate of interest and the term "Maximum Legal Amount" means the
                                           --------------------
maximum amount of interest that are permissible under applicable state or
federal law for the type of loan evidenced by this Note; provided that if
Article 1.04 of the Texas Credit Code is applicable to this Note, and applicable
state or federal law does not permit a higher interest rate, the "Indicated
(Weekly) Ceiling" (as defined in Article 1.04(a)(1) of the Texas Credit Code)
shall be the Interest Rate Ceiling applicable to this Note and shall be the
basis for determining the Maximum Lawful Rate in effect from time to time during
the term of this Note, unless a different Interest Rate Ceiling is designated on
the first page of this Note; and provided further that if applicable state or
federal law allows a higher interest rate or federal law preempts the state law
limiting the rate of interest, then the foregoing Interest Rate Ceiling shall
not be applicable to this Note; and provided further still that if the Maximum
Lawful Rate is increased by statute or other governmental action subsequent to
the date of this Note, then the new Maximum Lawful Rate shall be applicable to
this Note from the effective date thereof, unless otherwise prohibited by
applicable law; and "Prime Rate" means, for any day, the fluctuating rate of
                     ----------- 
interest announced by NationsBank of Texas, N.A. (or its successor) as its
"Prime Rate" or "NationsBank Prime Rate"; provided that NationsBank of Texas,
N.A. (or its successor) may from time to time announce other reference rates for
calculating interest, such as a "Business Base Rate", which shall not be
applicable to this Note; provided further that the Prime Rate

                                     - 2 -
<PAGE>
 
may not (i) be the only general reference rate used by NationsBank of Texas,
N.A. (or its successor) in calculating interest, (ii) correspond with increases
or decreases in interest rates charged by other lenders or market rates in
general, or (iii) be the lowest rate at which interest is charged by NationsBank
of Texas, N.A. (or its successor); and provided further still that if the Prime
Rate ceases to be available for any reason, then the Bank or any subsequent
holder of this Note may select a new interest rate based upon comparable
information which shall then be used as the reference rate for calculating
interest with regard to Prime Loans hereunder.

          Because of the possibility of irregular periodic balances of
principal, premature payment, and the fluctuating nature of the interest rate
applicable under this Note, the total interest which will accrue under this Note
cannot be determined in advance.  The Bank does not intend to contract for,
charge or receive more than the Maximum Lawful Rate or the Maximum Lawful Amount
permitted by applicable state or federal law, and to prevent such an occurrence
the Bank and the Borrower agree that all amounts of interest, whenever
contracted for, charged or received by the Bank, with respect to the loan of
money evidenced by this Note, shall be spread, prorated or allocated over the
full period of time this Note is unpaid, including the period of any renewal or
extension of this Note.  If demand for payment of this Note is made by the Bank
prior to the full stated term, the total amount of interest contracted for,
charged or received to the time of such demand shall be spread, prorated or
allocated along with any interest thereafter accruing over the full period of
time that this Note thereafter remains unpaid for the purpose of determining if
such interest exceeds the Maximum Lawful Amount.  At maturity (whether by
acceleration or otherwise) or on earlier final payment of this Note, the Bank
shall compute the total amount of interest that has been contracted for, charged
or received by the Bank or payable by the Borrower under this Note and compare
such amount to the Maximum Lawful Amount which could have been contracted for,
charged or received by the Bank.  If such computation reflects that the total
amount of interest that has been contracted for, charged or received by the Bank
or payable by the Borrower exceeds the Maximum Lawful Amount, then the Bank
shall apply such excess to the reduction of the principal balance and not to the
payment of interest; or if such excess interest exceeds the unpaid principal
balance, such excess shall be refunded to the Borrower.  This provision
concerning the crediting or refund or excess interest shall control and take
precedence over all other agreements between the Borrower and the Bank so that
under no circumstances shall the total interest contracted for, charged or
received by the Bank exceed the Maximum Lawful Amount.

          In consideration of the Bank's commitment to make advances hereunder,
the Borrower agrees to pay to the Bank a commitment fee of one-fourth of one
percent (1/4%) per annum on the daily average unused amount of the maximum
amount committed hereunder, payable quarterly in arrears on the last day of each
calendar quarter and on the Maturity Date.

          In the event the Bank shall determine (which determination shall be
presumed correct absent evidence of error) that:

          (i)    Unavailability.  On any date for determining the appropriate
                 --------------                                              
     Adjusted Eurodollar Rate or Adjusted CD Rate for any Interest Period, that
     by reason of any changes arising on or after the date of this Note
     affecting the interbank Eurodollar market or the certificate of deposit
     market, dollar deposits in the principal amount requested are not generally
     available in the interbank Eurodollar Market, in the case of Eurodollar
     Loans, or quotes for determination of the Adjusted CD Rate are unavailable,
     in the case of Adjusted CD Loans, or adequate, and fair means do not exist
     for ascertaining the applicable interest rate on the basis provided for in
     the definition of Adjusted Eurodollar Rate or Adjusted CD Rate,
     respectively; then Eurodollar Loans or Adjusted CD Loans, as appropriate,
     will no longer be available, and requests for a Eurodollar Loan or Adjusted
     CD Loans shall be deemed requests for Prime Loans, until such time as the
     Bank shall notify the Borrower that the circumstances giving rise thereto
     no longer exist.

          (ii)   Increased Costs.  At any time, that the Bank shall incur
                 ---------------                                         
     increased costs or reductions in the amounts received or receivable
     hereunder with respect to any Eurodollar Loans or Adjusted CD Loans because
     of any change since the date of this Note in any applicable law,
     governmental rule, regulation, guideline or order (or in the interpretation
     or administration thereof and including the introduction of any new law or
     governmental rule, regulation, guideline or order) including without

                                     - 3 -
<PAGE>
 
     limitation  the imposition, modification or deemed applicability of any
     reserves, deposits or similar requirements as related to Eurodollar Loans
     or Adjusted CD Loans (such as, for example, but not limited to, a change in
     official reserve requirements, but, in all events, excluding reserves
     required under Regulation D to the extent included in the computation of
     the Adjusted Eurodollar Rate or Adjusted CD Rate, as appropriate); then the
     Borrower shall pay to the Bank promptly upon written demand therefor, such
     additional amounts (in the form of an increased rate of, or a different
     method of calculating, interest or otherwise as the Bank may determine in
     its reasonable discretion) as may be required to compensate the Bank for
     such increased costs or reductions in amounts receivable hereunder (written
     notice as to the additional amounts owed to the Bank, showing the basis for
     calculation thereof, shall, absent evidence of error, be binding on all
     parties hereto).

          (iii)  Illegality.  At any time, that the making or continuance of any
                 ----------                                                     
     Eurodollar Loan has become unlawful by compliance by the Bank in good faith
     with any law, governmental rule, regulation, guideline or order (or would
     conflict with any such governmental rule, regulation, guideline or order
     not having the force of law even though the failure to comply therewith
     would not be unlawful), or has become impractical as a result of a
     contingency occurring after the date of this Note which materially and
     adversely affects the interbank Eurodollar market; then Eurodollar Loans
     will no longer be available, requests for Eurodollar Loans shall be deemed
     requests for Prime Loans and the Borrower may, and upon direction of the
     Bank, shall, as promptly as possible and, in any event within the time
     period required by law, have any such Eurodollar Loans then outstanding
     converted into Prime Loans.

     If the Bank shall have determined that the adoption or effectiveness of any
applicable law, rule or regulation regarding capital adequacy, or any change
therein, or any change after the date hereof in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation of administration thereof, or compliance
by the Bank with any request or directive regarding capital adequacy (whether or
not having the force of law) of any such authority, central bank or comparable
agency, has the effect of materially reducing the rate of return on the Bank's
capital or assets as a consequence of its commitments or obligations hereunder
to a level below that which the Bank could have achieved but for such adoption,
effectiveness, change or compliance (taking into consideration the Bank's
policies with respect to capital adequacy), then from time to time, within 15
days after demand by the Bank the Borrower shall pay to the Bank such additional
amount or amounts as will compensate the Bank for such reduction.  Upon
determining in good faith than any additional amounts will be payable pursuant
to this Section, the Bank will give prompt written notice thereof to the
Borrower, which notice shall set forth the basis of the calculation of such
additional amounts, although the failure to give any such notice shall not
release or diminish any of the Borrower's obligations to pay additional amounts
pursuant to this paragraph.  Determination by the Bank of amounts owing under
this paragraph shall, absent evidence of error, be binding on the parties
hereto.  Failure on the part of the Bank to demand compensation for any period
hereunder shall not constitute a waiver of the Bank's rights to demand any such
compensation in such period or in any other period.  Notwithstanding the
foregoing, amounts will be owing and payable under this paragraph only if it is
the Bank's general policy and practice to charge similarly situated borrowers
under such capital adequacy provisions.

     All payments made by the Borrower hereunder will be made without (but
without waiving any rights with respect to) setoff or counterclaim.  Promptly
upon notice from the Bank to the Borrower, the Borrower will pay, prior to the
date on which penalties attach thereto, but without duplication, all present and
future, stamp and other taxes, levies, or costs and charges whatsoever imposed,
assessed, levied or collected on or in respect of advances hereunder solely as a
result of the interest rate being determined by reference to the Adjusted
Eurodollar Rate or Adjusted CD Rate, as appropriate, and/or the provisions of
this Note relating to the Adjusted Eurodollar Rate or Adjusted CD Rate, as
appropriate, and/or the recording, registration, notarization or other
formalization of any thereof and/or any payments of principal, interest or other
amounts made on or in respect of advances hereunder when the interest rate is
determined by reference to the Adjusted Eurodollar Rate or Adjusted CD Rate, and
any increases thereof (all such taxes, levies, costs and charges being herein
collectively call "Taxes"), provided that Taxes shall not include taxes imposed
                   -----                                                       
on or measured by the income of the Bank by the United States of America or any
political subdivision or taxing authority thereof or therein, or taxes on or
measured by the overall net income of any foreign office, branch or Subsidiary
of the Bank by any foreign country of subdivision thereof in which that office,
branch or Subsidiary is doing business.  Promptly

                                     - 4 -
<PAGE>
 
after the date on which payment of any such Tax is due pursuant to applicable
law, the Borrower will at the request of the Bank, furnish to the Bank evidence,
in form and substance satisfactory to the Bank, that the Borrower has met its
obligations under this paragraph.  The Borrower will indemnify the Bank against,
and reimburse the Bank on demand for, any Taxes, as determined by the Bank in
its good faith discretion.  The Bank shall provide the Borrower with appropriate
receipts for any payments or reimbursements made by the Borrower pursuant to
this Section.

     The Borrower covenants and agrees that it will provide to the Bank (i)
detailed company-prepared consolidated financial statements of the Borrower
containing a balance sheet and income statement (with quarterly and year-to-date
figures) certified by the chief financial officer of the Borrower to be correct
and accurate in all material respects within 45 days of the end of each fiscal
quarter, and (ii) detailed audited consolidated financial statements of the
Borrower containing a balance sheet and income statement with an unqualified
opinion of independent certified public accountants of national standing
reasonably acceptable to the Bank within 120 days of the end of each fiscal
year.

     The following shall constitute Events of Default hereunder: (i) the failure
                                    -----------------                           
by the Borrower to make payment of principal on demand or when and as otherwise
due, (ii) the occurrence and continuance of an event of default under any other
note or agreement relating to indebtedness for borrowed money owing by the
Borrower which results in, or would permit, without further notice and/or the
expiration of any grace or cure periods, acceleration of such indebtedness for
borrowed money in an aggregate amount in excess of $1,000,000, (iii) failure to
observe or comply with any other covenants or provisions contained herein and
such failure shall continue for 30 days from the earlier of an officer of the
Borrower becoming aware thereof or receipt of written notice thereof from the
Bank, (iv) the filing of an action in bankruptcy or insolvency by the Borrower,
(v) the filing of an action in bankruptcy or insolvency against the Borrower and
the continuance of such action undismissed, unstayed and in effect for 60 days
from the date of filing, or (vi) the failure by B.F. Goodrich ("Goodrich") to
                                                                --------     
abide by the terms of that comfort letter dated February 17, 1997, given by
Goodrich to the Bank and relating to the Borrower (which comfort letter is an
extension of the terms and conditions contained in that certain comfort letter
given by Goodrich to the Bank relating to the Borrower dated February 1, 1995).
Upon the occurrence of an Event of Default hereunder, the unpaid principal
amount of all advances under this Note, together with all accrued but unpaid
interest hereon, may become, or may be declared to be, (or in the case of any
Event of Default resulting from items (iv) or (v) relating to the bankruptcy or
insolvency of the Borrower, shall, without action on the part of the Bank,
become), immediately due and payable, without presentation, demand, protest or
notice of any kind, all of which are hereby waived by the Borrower. In addition,
if Goodrich fails to maintain a controlling interest in the outstanding capital
stock of the Borrower, the amounts as set forth in the immediately preceding
sentence shall immediately become due and payable although the failure of
Goodrich to maintain such a controlling interest shall not constitute an Event
of Default under this paragraph.

     In the event amounts under this Note are not paid when due at any stated or
accelerated maturity, interest on all amounts owing hereunder shall accrue at a
rate 2% in excess of the rate otherwise applicable but not in excess of the rate
permitted by law (such rate sometimes being referred to herein as the "Default
                                                                       -------
Rate").  The Borrower agrees to pay, in addition to the principal and interest,
- ----                                                                           
all costs of collection, including reasonable attorneys fees.

     The Bank agrees not to assign or otherwise transfer this Note, other than
to a subsidiary of affiliate of the Bank, without the prior written consent of
the Borrower.

     Notices hereunder shall be deemed given and be effective (i) when
delivered, (ii) when transmitted via telecopy to the number set out below, (iii)
the day following the day on which the same has been delivered prepaid to a
reputable national overnight air courier service, or (iv) the third business day
following the day on which the same is sent by certified or registered mail,
postage prepaid, in each case to the respective parties at the address set forth
below, or at such other address as such party may specify by written notice to
the other parties hereto:

                                     - 5 -
<PAGE>
 
     if to the Borrower:  DTM Corporation
                          1611 Headway Circle
                          Building 2
                          Austin, Texas 78754
                          Attn:  John Murchison
                          Telephone:  (512) 339-2922
                          Telecopy:   (512) 339-0634

     if to the Bank:      NationsBank of Texas, N.A.
                          NationsBank Corporate Center, 8th Floor
                          Charlotte, North Carolina 28255
                          Attn:  Phil Durand
                          Telephone:  (704) 386-4955
                          Telecopy:   (704) 388-0960

     No delay or omission on the part of the holder of this Note in exercising
any right hereunder shall operate as a waiver of such right or of any right of
such holder nor shall any delay, omission or waiver on any one occasion be
deemed a bar to or  waiver of the same or any other right on any future
occasion.  The Borrower assents to any one or more extensions or postponements
of the time of payment or any other indulgences, to any substitutions, exchanges
or releases of collateral if at any time there is collateral available to the
holder of this Note, and to the additions or releases of any other parties or
persons primarily or secondarily liable.

     BORROWER AND ALL OTHER PARTIES LIABLE FOR THIS NOTE WAIVE DEMAND, NOTICE OF
INTENT TO DEMAND, PRESENTMENT FOR PAYMENT, NOTICE OF NONPAYMENT, PROTEST, NOTICE
OF PROTEST, GRACE, NOTICE OF DISHONOR, NOTICE OF INTENT TO ACCELERATE MATURITY,
NOTICE OF ACCELERATION OF MATURITY, AND DILIGENCE IN COLLECTION.  EACH MAKER,
SURETY, ENDORSER, AND GUARANTOR OF THIS NOTE WAIVES AND AGREES TO ONE OR MORE
EXTENSIONS FOR ANY PERIOD OR PERIODS OF TIME, AND ANY PARTIAL PAYMENTS, BEFORE
OR AFTER MATURITY, WITHOUT PREJUDICE TO THE HOLDER OF THIS NOTE.  EACH MAKER,
SURETY, ENDORSER, AND GUARANTOR WAIVES NOTICE OF ANY AND ALL RENEWALS,
EXTENSIONS, REARRANGEMENTS, AND MODIFICATIONS OF THIS NOTE.

     THIS NOTE HAS BEEN EXECUTED AND DELIVERED IN TEXAS, AND SHALL BE CONSTRUED
IN ACCORDANCE WITH THE APPLICABLE LAWS OF THE STATE OF TEXAS AND THE LAWS OF THE
UNITED STATES OF AMERICA APPLICABLE TO TRANSACTIONS IN TEXAS.  IN ADDITION, THE
BORROWER HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY
LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS NOTE AND THE ADVANCES
HEREUNDER AND CONSENTS TO THE JURISDICTION OF FEDERAL AND STATE COURTS LOCATED
IN TRAVIS COUNTY, TEXAS.

     THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, OR CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.

     This Note amends and restates, and is given in substitution of, that
certain $4,700,000 Amended, Restated and Substituted Promissory Note dated
May 13, 1996 executed by the Borrower in favor of the Bank (the "Replaced
                                                                 --------
Note").  This Note evidences the same indebtedness evidenced by the Replaced
- ----                                                                        
Note and is secured by the same collateral, if any, securing the Replaced Note.

                                     - 6 -
<PAGE>
 
       IN WITNESS WHEREOF, the Borrower has caused this Note to be executed
under seal and delivered by its duly authorized officer as of the date first
above written.

                                      DTM CORPORATION

ATTEST:
                                      By  /s/ JOHN S. MURCHISON, III
                                        ---------------------------------

By /s/ UDAY BELLARY
- -------------------------
                                      Title       President & CEO
 _______ Secretary                         ------------------------------


 (Corporate Seal)

                                     - 7 -
<PAGE>
 
                              SCHEDULE OF ADVANCES
                              --------------------
<TABLE> 
<CAPTION> 
                   Principal Amount          Applicable                                 Outstanding Principal
                      of Advance           Interest Rate          Maturity of          Balances After Advances        Notation
Date                  (Payment)             of Advance              Advance                 (Payment)                 Made By
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                <C>                     <C>                    <C>                  <C>                            <C> 






</TABLE> 

                                     - 8 -

<PAGE>
 
                                                                    EXHIBIT 10.8

                            AMENDED PROMISSORY NOTE

$3,500,000.00                                                  February 17, 1997

     FOR VALUE RECEIVED, the undersigned, DTM CORPORATION, a Texas
corporation (the "Borrower") hereby promises to pay to the order of NATIONAL
CITY BANK, a national banking association, its successors or assigns (the
"Bank"), at its offices in Cleveland, Ohio (or at such other place or places as
the Bank may designate) the maximum principal amount of Three Million Five
Hundred Thousand and No/100ths Dollars ($3,500,000.00), as such maximum amount
is reduced hereunder, or such lesser principal amount as may be borrowed and
outstanding hereunder from time to time on the earlier of (i) the last day of an
Interest Period or (ii) July 31, 1998 (as such may be extended, if extended,
from time to time in the Bank's sole discretion, the "maturity Date").

     Advances (including conversions and extensions) shall be made from
time to time hereunder upon request of the Borrower not later than 11:00 a.m.
(Cleveland, Ohio time) on the date of requested advance in the case of Adjusted
CD Loans and on the third business day prior to the requested advance in the
case of Eurodollar Loans.  The terms of each advance shall be noted on the
schedule attached hereto, the terms of which shall be presumed correct absent
evidence of error; provided, however that any failure to make such notation (or
any inaccuracy in such notation) shall not limit or otherwise affect the
obligations of the Borrower hereunder.   The Bank's obligation to make advances
hereunder is subject to the condition that immediately prior to and immediately
after giving effect to any such advance (i) no Event of Default hereunder, or
event or condition which upon notice or lapse of time would constitute an Event
of Default, shall then exist and be continuing, and (ii) the aggregate amount of
advances outstanding hereunder shall not exceed the maximum committed amount of
this Note (as such maximum amount may be reduced from time to time).   As used
herein, "Interest Period" means a period of (i) thirty (30), sixty (60), ninety
(90) or one hundred eighty (180) days duration, in the case of Adjusted CD
Loans, (ii) one (1), two (2), three (3) or six (6) months, duration, in the case
of Eurodollar Loans, and (iii) such number of days duration as the Borrower may
request not to exceed thirty (30) days, in the case of Prime Loans, provided,
however, that (A) each Interest Period which would otherwise end on a day which
is not a business day shall end on the next succeeding business day unless, in
the case of Eurodollar Loans, such succeeding business day falls in the next
calendar month and then in such case on the next preceding business day and (B)
no Interest Period shall extend beyond the Maturity Date.

     The principal amount of each advance shall be due and interest thereon
shall accrue as agreed upon and noted on the schedule attached.  This Note shall
bear interest on the outstanding balance hereunder at a per annum interest rate
equal to (i) the Adjusted Eurodollar Rate plus 5/8% (hereinafter advances which
bear interest based on the Adjusted Eurodollar Rate may be referred to as
"Eurodollar Loans"), (ii) the Adjusted CD Rate plus 5/8% (hereinafter advances
which bear interest based on the Adjusted CD Rate may be referred to as
"Adjusted CD Loans") or (iii) the Prime Rate (hereinafter advances which bear
interest based on the Prime Rate may be referred to as "Prime Loans"), as the
Borrower may elect in accordance with the provisions hereof.  Unless otherwise
agreed, accrued interest with respect to each such advance shall be 
<PAGE>
 
payable in arrears on the last day of an Interest Period for such advance, but
in any event not less frequently than once every ninety (90) days. Whenever a
payment on this Note is stated to be due on a day which is not a business day,
such payment shall be made on the next succeeding business day with interest
accruing to the date of payment. Interest hereunder shall be computed on the
basis of actual number of days elapsed over a year of 360 days, except for the
Default Rate (as hereinafter defined) which shall be computed on the basis of
actual number of days elapsed over a year of 365/366 days, as applicable.
Prepayments of fixed-rate advances (Adjusted CD Loans and Eurodollar Loans) are
not permitted prior to maturity of Interest Periods. The Borrower agrees to
indemnify the Bank against all reasonable losses, expenses and liabilities
sustained by the Bank on account of the Borrower (i) failing to accept a fixed
rate loan after notice to the Bank of its acceptance of any such fixed rate loan
and (ii) making a prepayment on a fixed rate loan prior to the last day of an
Interest period. As used herein; "Adjusted CD Rate" means for the respective
                                  ----------------
Interest Period a per annum interest rate equal to the sum of (a) the per annum
rate obtained by dividing (i) the rate of interest determined by the Bank to be
the average (rounded upward to the nearest whole multiple of l/100 of 1% per
annum, if such average is not such a multiple) of the consensus bid rate
determined by the Bank for the bid rates per annum, at 9:00 a.m. (Cleveland,
Ohio time) ( or as soon thereafter as is practicable) on the first day of such
Interest Period, of certificate of deposit dealers of recognized standing
selected by the Bank for the purchase at face value of the Bank's certificates
of deposit in an amount substantially equal to the Adjusted CD Loan comprising
part of such borrowing (including extensions and renewals) and with a maturity
equal to such Interest Period, by (ii) a percentage equal to one hundred percent
(100%) minus the Adjusted CD Reserve Percentage (as defined below) for such
Interest Period, plus (b) the Assessment Rate (as defined below) for such
Interest Period; "Adjusted CD Rate Reserve Percentage" for the Interest Period
for each Adjusted CD Loan comprising part of the same borrowing (including
conversions, extensions and renewals) means the reserve percentage applicable on
the first day of such Interest Period under regulations issued from time to time
by the Board of Governors of the Federal Reserve System (or any successor) for
determining the maximum reserve requirement (including, but not limited to, any
emergency, supplemental or other marginal reserve requirement) for a member bank
of the Federal Reserve System in New York City with deposits exceeding One
Billion and No/100ths Dollars ($1,000,000,000.00) with respect to liabilities
consisting of or including (among other liabilities) U.S. dollar nonpersonal
time deposits in the United States with a maturity equal to such Interest
Period; "Assessment Rate" for the Interest Period for each Adjusted CD Loan
comprising part of the same borrowing (including conversions, extensions and
renewals) means the annual assessment rate estimated by the Bank on the first
day of such Interest Period for determining the then current annual assessment
payable by the Bank to the Federal Deposit Insurance Corporation (or any
successor) for insuring U.S. dollar deposits of the Bank in the United States;
"Adjusted Eurodollar Rate" means for the respective Interest Period, a per annum
 ------------------------
interest rate equal to the per annum rate obtained by dividing (a) the rate of
interest determined by the Bank to be the average (rounded upward to the nearest
whole multiple of 1/16 of 1% per annum, if such average is not such a multiple)
of the per annum rates at which deposits in U.S. dollars are offered to the Bank
in the interbank eurodollar market at 10:00 A.M. (Cleveland, Ohio time) (or as
soon thereafter as is practicable), in each case two (2) Business Days before
the first day of such Interest Period in an amount substantially equal to such
Eurodollar Loan and for a period equal to such Interest Period 

                                       2
<PAGE>
 
by (b) a percentage equal to one hundred percent (100%) minus the Adjusted
Eurodollar Reserve Percentage for such Interest Period; "Adjusted Eurodollar
                                                         -------------------
Rate Reserve Percentage" means the percentage applicable two (2) Business Days 
- -----------------------                                 
before the first day of such Interest Period under regulations issued from time
to time by the Board of Governors of the Federal Reserve System (or any
successor) for determining the maximum reserve requirement (including, without
limitation, any emergency, supplemental or other marginal reserve requirement)
for the Bank with respect to liabilities or assets consisting of or including
eurocurrency liabilities, as such term is defined in Regulation D (or with
respect to any other category of liabilities which includes deposits by
reference to which the interest rate on Eurodollar Loans is determined) having a
term equal to the Interest Period for which such Adjusted Eurodollar Reserve
Percentage is determined; and "Prime Rate" means, for any day, the fluctuating
                               ----------                
rate of interest announced by Bank (or its successor) as its "Prime Rate";
provided that Bank (or its successor) may from time to time announce other
reference rates for calculating interest which shall not be applicable to this
Note; provided further that the Prime Rate may not (i) be the only general
reference rate used by Bank (or its successor) in calculating interest, (ii)
correspond with increases or decreases in interest rates charged by other
lenders or market rates in general, or (iii) be the lowest rate at which
interest is charged by Bank (or its successor); and provided further still that
if the Prime Rate ceases to be available for any reason, then the Bank or any
subsequent holder of this Note may select a new interest rate based upon
comparable information which shall then be used as the reference rate for
calculating interest with regard to Prime Loans hereunder.

     In consideration of the Bank's commitment to make advances hereunder,
the Borrower agrees to pay to the Bank a commitment fee of one-fourth of one
percent (1/4%) per annum on the daily average unused amount of the maximum
amount committed hereunder, payable quarterly in arrears on the last day of each
calendar quarter and on the Maturity Date.

     In the event the Bank shall determine (which determination shall be
presumed correct absent evidence of error) that:

     (i) Unavailability. On any date for determining the appropriate
         -------------- 
     Adjusted Eurodollar Rate or Adjusted CD Rate for any Interest Period, that
     by reason of any changes arising on or after the date of this Note
     affecting the interbank Eurodollar market or the certificate of deposit
     market, dollar deposits in the principal amount requested are not generally
     available in the interbank Eurodollar Market, in the case of Eurodollar
     Loans, or quotes for determination of the Adjusted CD Rate are unavailable,
     in the case of Adjusted CD Loans, or adequate, and fair means do not exist
     for ascertaining the applicable interest rate on the basis provided for in
     the definition of Adjusted Eurodollar Rate or Adjusted CD Rate,
     respectively; then Eurodollar Loans or Adjusted CD Loans, as appropriate,
     will no longer be available, and requests for a Eurodollar Loan or adjusted
     CD Loans shall be deemed requests for Prime Loans, until such time as the
     Bank shall notify the Borrower that the circumstances giving rise thereto
     no longer exist.

     (ii) Increased Costs. At any time, that the Bank shall incur increased
          --------------- 
     costs or reductions in the amounts received or receivable hereunder with
     respect to any Eurodollar Loans or 

                                       3
<PAGE>
 
     Adjusted CD Loans because of any change since the date of this Note in any
     applicable law, governmental rule, regulation, guideline or order (or in
     the interpretation or administration thereof and including the introduction
     of any new law or governmental rule, regulation, guideline or order)
     including without limitation the imposition, modification or deemed
     applicability of any reserves, deposits or similar requirements as related
     to Eurodollar Loans or Adjusted CD Loans (such as for example, but not
     limited to, a change in official reserve requirements, but, in all events,
     excluding reserves required under Regulation D to the extent included in
     the computation of the Adjusted Eurodollar Rate or Adjusted CD Rate, as
     appropriate); then the Borrower shall pay to the Bank promptly upon written
     demand therefor, such additional amounts (in the form of an increased rate
     of, or a different method of calculating, interest or otherwise as the Bank
     may determine in its reasonable discretion) as may be required to
     compensate the Bank for such increased costs or reductions in amounts
     receivable hereunder (written notice as to the additional amounts owed to
     the Bank, showing the basis for calculation thereof, shall, absent evidence
     of error, be binding on all parties hereto).

     (iii) Illegality.  At any time, that the making or continuance of any
           ----------                                                     
     Eurodollar Loan has become unlawful by compliance by the Bank in good faith
     with any law, governmental rule, regulation, guideline or order (or would
     conflict with any such governmental rule, regulation, guideline or order
     not having the force of law even though the failure to comply therewith
     would not be unlawful), or has become impractical as a result of a
     contingency occurring after the date of this Note which materially and
     adversely affects the interbank Eurodollar market; then Eurodollar Loans
     will no longer be available, requests for Eurodollar Loans shall be deemed
     requests for Prime Loans and the Borrower may, and upon direction of the
     Bank, shall, as promptly as possible and, in any event within the time
     period required by law, have any such Eurodollar Loans then outstanding
     converted into Prime Loans.

     If the Bank shall have determined that the adoption or effectiveness of any
applicable law, rule or regulation regarding capital adequacy, or any change
therein, or any change after the date hereof in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by the Bank with any request or directive regarding capital adequacy (whether or
not having the force of law) of any such authority, central bank or comparable
agency, has the effect of materially reducing the rate of return on the Bank's
capital or assets as a consequence of its commitments or obligations hereunder
to a level below that which the Bank could have achieved but for such adoption,
effectiveness, change or compliance (taking into consideration the Bank's
policies with respect to capital adequacy), then from time to time, within
fifteen (15) days after demand by the Bank the Borrower shall pay to the Bank
such additional amount or amounts as will compensate the Bank for such
reduction. Upon determining in good faith than any additional amounts will be
payable pursuant to this Section, the Bank will give prompt written notice
thereof to the Borrower, which notice shall set forth the basis of the
calculation of such additional amounts, although the failure to give any such
notice shall not release or diminish any of the Borrower's obligations to pay
additional amounts pursuant to this paragraph. Determination by 

                                       4
<PAGE>
 
the Bank of amounts owing under this paragraph shall, absent evidence of error,
be binding on the parties hereto. Failure on the part of the Bank to demand
compensation for any period hereunder shall not constitute a waiver of the
Bank's rights to demand any such compensation in such period or in any other
period. Notwithstanding the foregoing, amounts will be owing and payable under
this paragraph only if it is the Bank's general policy and practice to charge
similarly situated borrowers under such capital adequacy provisions.

     All payments made by the Borrower hereunder will be made without (but
without waiving any rights with respect to) setoff or counterclaim. Promptly
upon notice from the Bank to the Borrower, the Borrower will pay, prior to the
date on which penalties attach thereto, but without duplication, all present and
future, stamp and other taxes, levies, or costs and charges whatsoever imposed,
assessed, levied or collected on or in respect of advances hereunder solely as a
result of the interest rate being determined by reference to the Adjusted
Eurodollar Rate or Adjusted CD Rate, as appropriate, and/or the provisions of
this Note relating to the Adjusted Eurodollar Rate or Adjusted CD Rate, as
appropriate and/or the recording, registration, notarization or other
formalization of any thereof and/or any payments of principal, interest or other
amounts made on or in respect of advances hereunder when the interest rate is
determined by reference to the Adjusted Eurodollar Rate or Adjusted CD Rate, and
any increases thereof (all such taxes, levies, costs and charges being herein
collectively called "Taxes"), provided that Taxes shall not include taxes
imposed on or measured by the income of the Bank by the United States of America
or any political subdivision or taxing authority thereof or therein, or taxes on
or measured by the overall net income of any foreign office, branch or
Subsidiary of the Bank by any foreign country or subdivision thereof in which
that office, branch or Subsidiary is doing business. Promptly after the date on
which payment of any such Tax is due pursuant to applicable law, the Borrower
will at the request of the Bank, furnish to the Bank evidence, in form and
substance satisfactory to the Bank, that the Borrower has met its obligations
under this paragraph. The Borrower will indemnify the Bank against, and
reimburse the Bank on demand for, any Taxes, as determined by the Bank in its
good faith discretion. The Bank shall provide the Borrower with appropriate
receipts for any payments or reimbursements made by the Borrower pursuant to
this Section.

     The Borrower covenants and agrees that it will provide to the Bank (i)
detailed companyprepared consolidated financial statements of the Borrower
containing a balance sheet and income statement (with quarterly and year-to-date
figures) certified by the chief financial officer of the Borrower to be correct
and accurate in all material respects within forty-five (45) days of the end of
each fiscal quarter, and (ii) detailed audited consolidated financial statements
of the Borrower containing a balance sheet and income statement with an
unqualified opinion of independent certified public accountants of national
standing reasonably acceptable to the Bank within one hundred twenty (120) days
of the end of each fiscal year.

     The following shall constitute Events of Default hereunder: (i) the failure
by the Borrower to make payment of principal on demand or when and as otherwise
due, (ii) the occurrence and continuance of an event of default under any other
note or agreement relating to indebtedness for borrowed money owing by the
Borrower which results in, or would permit, without further notice and/or the
expiration of any grace or cure periods, acceleration of such indebtedness for
borrowed 

                                       5
<PAGE>
 
money in an aggregate amount in excess of One Million and No/l00ths Dollars
($1,000,000.00), (iii) failure to observe or comply with any other covenants or
provisions contained herein and such failure shall continue for thirty (30) days
from the earlier of an officer of the Borrower becoming aware thereof or receipt
of written notice thereof from the Bank, (iv) the filing of an action in
bankruptcy or insolvency by the Borrower, (v) the filing of an action in
bankruptcy or insolvency against the Borrower and the continuance of such action
undismissed, unstayed and in effect for sixty (60) days from the date of filing,
or (vi) the failure by B. F. Goodrich ("Goodrich") to abide by the terms of that
comfort letter dated February 17, 1997 given by Goodrich to the Bank. Upon the
occurrence of an Event of Default hereunder, the unpaid principal amount of all
advances under this Note, together with all accrued but unpaid interest hereon,
may become, or may be declared to be, (or in the case of any Event of Default
resulting from items (iv) or (v) relating to the bankruptcy or insolvency of the
Borrower, shall, without action on the part of the Bank, become), immediately
due and payable, without presentation, demand, protest or notice of any kind,
all of which are hereby waived by the Borrower. In addition, if Goodrich fails
to maintain a controlling interest in the outstanding capital stock of the
Borrower, the amounts as set forth in the immediately preceding sentence shall
immediately become due and payable although the failure of Goodrich to maintain
such a controlling interest shall not constitute an Event of Default under this
paragraph.

     In the event amounts under this Note are not paid when due at any stated or
accelerated maturity, interest on all amounts owing hereunder shall accrue at a
rate two percent (2%) in excess of the rate otherwise applicable but not in
excess of the rate permitted by law (such rate sometimes being referred to
herein as the "Default Rate"). The Borrower agrees to pay, in addition to the
principal and interest, all costs of collection, including reasonable attorneys
fees.

     The Bank agrees not to assign or otherwise transfer this Note, other than
to a subsidiary of affiliate of the Bank, without the prior written consent of
the Borrower.

     Notices hereunder shall be deemed given and be effective (i) when
delivered, (ii) when transmitted via telecopy to the number set out below, (iii)
the day following the day on which the same has been delivered prepaid to a
reputable national overnight air courier service, or (iv) the third business day
following the day on which the same is sent by certified or registered mail,
postage prepaid, in each case to the respective parties at the address set forth
below, or at such other address as such party may specify by written notice to
the other parties hereto:

                                       6
<PAGE>
 
IF TO THE BORROWER:                        DTM CORPORATION
                                           1611 Headway Circle
                                           Building 2
                                           Austin, Texas 78754
                                           Attn: Greg Logwinuk
                                           Telephone: (512) 339-2922
                                           Telecopy: (512) 339-0634
 
IF TO THE BANK:                            NATIONAL CITY BANK
                                           1900 East Ninth Street
                                           Cleveland, Ohio 44108
                                           Attn:  David R. Evans
                                           Telephone: 216 575-2356
                                           Telecopy: 216 575-9396

     No delay or omission on the part of the holder of this Note in
exercising any right hereunder shall operate as a waiver of such right or of any
right of such holder nor shall any delay, omission or waiver on any one occasion
be deemed a bar to or waiver of the same or any other right on any future
occasion. The Borrower assents to any one or more extensions or postponements of
the time of payment or any other indulgences, to any substitutions, exchanges or
releases of collateral if at any time there is collateral available to the
holder of this Note, and to the additions or releases of any other parties or
persons primarily or secondarily liable.

     This Note amends, extends the maturity of and replaces Borrower's
May __, 1996 Amended Promissory Note.

     BORROWER AND ALL OTHER PARTIES LIABLE FOR THIS NOTE WAIVE DEMAND, NOTICE OF
     INTENT TO DEMAND, PRESENTMENT FOR PAYMENT, NOTICE OF NONPAYMENT, PROTEST,
     NOTICE OF PROTEST, GRACE, NOTICE OF DISHONOR, NOTICE OF INTENT TO
     ACCELERATE MATURITY, NOTICE OF ACCELERATION OF MATURITY, AND DILIGENCE IN
     COLLECTION. EACH MAKER, SURETY, ENDORSER, AND GUARANTOR OF THIS NOTE WAIVES
     AND AGREES TO ONE OR MORE EXTENSIONS FOR ANY PERIOD OR PERIODS OF TIME, AND
     ANY PARTIAL PAYMENTS, BEFORE OR AFTER MATURITY, WITHOUT PREJUDICE TO THE
     HOLDER OF THIS NOTE. EACH MAKER, SURETY, ENDORSER, AND GUARANTOR WAIVES
     NOTICE OF ANY AND ALL RENEWALS, EXTENSIONS, REARRANGEMENTS, AND
     MODIFICATIONS OF THIS NOTE.

     THIS NOTE HAS BEEN EXECUTED AND DELIVERED IN OHIO, AND SHALL BE CONSTRUED
     IN ACCORDANCE WITH THE APPLICABLE LAWS OF THE STATE OF OHIO AND THE LAWS OF
     THE UNITED STATES OF AMERICA APPLICABLE TO TRANSACTIONS IN OHIO. IN
     ADDITION, THE BORROWER HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL
     BY JURY IN ANY 

                                       7
<PAGE>
 
     LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS NOTE AND THE ADVANCES
     HEREUNDER AND CONSENTS TO THE JURISDICTION OF FEDERAL AND STATE COURTS
     LOCATED IN CUYAHOGA COUNTY, OHIO.

     THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
     CONTRADICTED BY EVIDENCE OF PRIOR, OR CONTEMPORANEOUS, OR SUBSEQUENT ORAL
     AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN
     THE PARTIES.

     IN WITNESS WHEREOF, the Borrower has caused this Note to be executed under
seal and delivered by its duly authorized officer as of the date first above
written.

ATTEST:                               DTM CORPORATION

By:  /s/ UDAY BELLARY                 By:  /s/ JOHN S. MURCHISON, III
                                         -----------------------------------

__________________ Secretary          Title:  President & CEO


                                       8
<PAGE>
 
                              SCHEDULE OF ADVANCES

<TABLE>
<CAPTION>
    Principal         Applicable     Maturity        Outstanding       Notation
    Amount of          Interest     of Advance        Principal          Made
     Advance           rate of                      Balances After        By
    (Payment)          Advance                         Advances      
                                                      (Payment)      
 
    <S>               <C>           <C>             <C>                <C>  





</TABLE>

<PAGE>
 
                                                                    EXHIBIT 10.9
 
                                PROMISSORY NOTE

$4,000,000                                                     February 17, 1997

          This Promissory Note serves to cancel and replace that certain 
Promissory Note dated August 15, 1996 between DTM CORPORATION and TEXAS COMMERCE
BANK NATIONAL ASSOCIATION.

          FOR VALUE RECEIVED, the undersigned, DTM CORPORATION, a Texas
corporation (the "Borrower") hereby promises to pay to the order of TEXAS
                 ----------
COMMERCE BANK NATIONAL ASSOCIATION, a national banking association, its
successors or assigns (the "Bank"), at its offices in Austin, Texas (or at such
                           ------
other place or places as the Bank may designate) the maximum principal amount of
FOUR MILLION DOLLARS ($4,000,000), as such maximum amount is reduced hereunder,
or such lesser principal amount as may be borrowed and outstanding hereunder
from time to time on the earlier of (i) the last day of an Interest Period or
(iii) July 31, 1998 (as such date may be extended, if extended, from time to
time in the Bank's sole discretion, the "Maturity Date").
                                        ---------------

          Advances (including conversions and extensions) shall be made from
time to time hereunder upon request of the Borrower not later than 11:00 a.m.
(Austin, Texas time) on the date of requested advance in the case of Prime
Loans, on the second business day prior to the requested advance in the case of
Adjusted CD Loans and on the third business day prior to the requested advance
in the case of Eurodollar Loans.  The terms of each advance shall be noted on
the schedule attached hereto, the terms of which shall be presumed correct
absent evidence of error; provided, however that any failure to make such
                          --------                                       
notation (or any inaccuracy in such notation) shall not limit or otherwise
affect the obligations of the Borrower hereunder.  The Bank's obligation to make
advances hereunder is subject to the condition that immediately prior to and
immediately after giving effect to any such advance (i) no Event of Default
hereunder, or event or condition which upon notice or lapse of time would
constitute an Event of Default, shall then exist and be continuing, and (ii) the
aggregate amount of advances outstanding hereunder shall not exceed the maximum
committed amount of this Note (as such maximum amount may be reduced from time
to time).  As used herein, "Interest Period" means a period of (i) 30, 60, 90 or
                            ---------------                                     
180 days duration, in the case of Adjusted CD Loans, (ii) one, two, three or six
months, duration, in the case of Eurodollar Loans, and (iii) such number of days
duration as the Borrower may request not to exceed 30 days, in the case of Prime
Loans; provided, however, that (A) each Interest Period which would otherwise
end on a day which is not a business day shall end on the next succeeding
business day unless, in the case of Eurodollar Loans, such succeeding business
day falls in the next calendar month and then in such case on the next preceding
business day and (B) no Interest Period shall extend beyond the Maturity Date.

          The principal amount of each advance shall be due and interest thereon
shall accrue as agreed upon and noted on the schedule attached.  This Note shall
bear interest on the outstanding balance hereunder at a per annum interest rate
equal to (i) the Adjusted Eurodollar Rate plus 5/8% (hereinafter advances which
bear interest based on the Adjusted Eurodollar Rate may be referred to as
                                                                         
"Eurodollar Loans"), (ii) the Adjusted CD Rate plus 5/8% (hereinafter advances
- -----------------                                                             
which bear interest based on the Adjusted CD Rate may be referred to as
                                                                       
"Adjusted CD Loans") or (iii) the Prime Rate (hereinafter advances which bear
- ------------------                                                           
interest based on the Prime Rate may be referred to as "Prime Loans"), as the
                                                        -----------          
Borrower may elect in accordance with the provisions hereof; provided, however,
                                                             --------          
that the interest rate applicable hereunder shall not exceed the Maximum Lawful
Rate (as hereafter defined).  Unless otherwise agreed, accrued interest with
respect to each such advance shall be payable in arrears on the last day of an
Interest Period for such advance, but in any event not less frequently than once
every 90 days.  Whenever a payment on this Note is stated to be due on a day
which is not a business day, such payment shall be made on the next succeeding
business day with interest accruing to the date of payment.  Interest hereunder
shall be computed on the basis of actual number of days elapsed over a year of
360 days, except for the Default Rate (as hereafter defined) which shall be
computed on the basis of actual number of days elapsed over a year of 365/366
days, as applicable.  Prepayments of fixed-rate advances (Adjusted CD Loans and
Eurodollar Loans) are not permitted prior to maturity of Interest Periods.  The
Borrower agrees to indemnify the Bank against all  reasonable losses, expenses
and liabilities sustained by the Bank on account of the Borrower (i) failing to
accept a fixed rate loan after notice to the Bank of its acceptance of any such
fixed rate loan and (ii) making a prepayment on a fixed rate loan prior to the
last day of an Interest period.  As used
<PAGE>
 
herein;  "Adjusted CD Rate" means for the respective Interest Period a per annum
          ----------------                                                      
interest rate equal to the sum of (a) the per annum rate obtained by dividing
(i) the rate of interest determined by the Bank to be the average (rounded
upward to the nearest whole multiple of 1/100 of 1% per annum, if such average
is not such a multiple) of the consensus bid rate determined by the Bank for the
bid rates per annum, at 9:00 A.M. (Austin, Texas time) (or as soon thereafter as
is practicable) on the first day of such Interest Period, of certificate of
deposit dealers of recognized standing selected by the Bank for the purchase at
face value of the Bank's certificates of deposit in an amount substantially
equal to the Adjusted CD Loan comprising part of such borrowing (including
extensions and renewals) and with a maturity equal to such Interest Period, by
(ii) a percentage equal to 100% minus the Adjusted CD Reserve Percentage (as
defined below) for such Interest Period, plus (b) the Assessment Rate (as
defined below) for such Interest Period;  "Adjusted CD Rate Reserve Percentage"
                                           ----------------------------------- 
for the Interest Period for each Adjusted CD Loan comprising part of the same
borrowing (including conversions, extensions and renewals) means the reserve
percentage applicable on the first day of such Interest Period under regulations
issued from time to time by the Board of Governors of the Federal Reserve System
(or any successor) for determining the maximum reserve requirement (including,
but not limited to, any emergency, supplemental or other marginal reserve
requirement) for a member bank of the Federal Reserve System in New York City
with deposits exceeding one billion dollars with respect to liabilities
consisting of or including (among other liabilities) U.S. dollar nonpersonal
time deposits in the United States with a maturity equal to such Interest
Period; "Assessment Rate" for the Interest Period for each Adjusted CD Loan
         ---------------                                                   
comprising part of the same borrowing (including conversions, extensions and
renewals) means the annual assessment rate estimated by the Bank on the first
day of such Interest Period for determining the then current annual assessment
payable by the Bank to the Federal Deposit Insurance Corporation (or any
successor) for insuring U.S. dollar deposits of the Bank in the United States;
"Adjusted Eurodollar Rate" means for the respective Interest Period, a per annum
 ------------------------                                                       
interest rate equal to the per annum rate obtained by dividing (a) the rate of
interest determined by the Bank to be the average (rounded upward to the nearest
whole multiple of 1/16 of 1% per annum, if such average is not such a multiple)
of the per annum rates at which deposits in U.S. dollars are offered to the Bank
in the interbank eurodollar market at 10:00 A.M. (Austin, Texas time) (or as
soon thereafter as is practicable), in each case two Business Days before the
first day of such Interest Period in an amount substantially equal to such
Eurodollar Loan and for a period equal to such Interest Period by (b) a
percentage equal to 100% minus the Adjusted Eurodollar Reserve Percentage for
such Interest Period; "Adjusted Eurodollar Rate Reserve Percentage" means the
                       ------------------------------------------- 
percentage applicable two Business Days before the first day of such Interest
Period under regulations issued from time to time by the Board of Governors of
the Federal Reserve System (or any successor) for determining the maximum
reserve requirement (including, without limitation, any emergency, supplemental
or other marginal reserve requirement) for the Bank with respect to liabilities
or assets consisting of or including eurocurrency liabilities, as such term is
defined in Regulation D (or with respect to any other category of liabilities
which includes deposits by reference to which the interest rate on Eurodollar
Loans is determined) having a term equal to the Interest Period for which such
Adjusted Eurodollar Reserve Percentage is determined; "Maximum Legal Rate" means
                                                       ------------------  
the maximum rate of interest and the term "Maximum Legal Amount" means the
                                           --------------------
maximum amount of interest that are permissible under applicable state or
federal law for the type of loan evidenced by this Note; provided that if
Article 1.04 of the Texas Credit Code is applicable to this Note, and applicable
state or federal law does not permit a higher interest rate, the "Indicated
(Weekly) Ceiling" (as defined in Article 1.04(a)(1) of the Texas Credit Code)
shall be the Interest Rate Ceiling applicable to this Note and shall be the
basis for determining the Maximum Lawful Rate in effect from time to time during
the term of this Note, unless a different Interest Rate Ceiling is designated on
the first page of this Note; and provided further that if applicable state or
federal law allows a higher interest rate or federal law preempts the state law
limiting the rate of interest, then the foregoing Interest Rate Ceiling shall
not be applicable to this Note; and provided further still that if the Maximum
Lawful Rate is increased by statute or other governmental action subsequent to
the date of this Note, then the new Maximum Lawful Rate shall be applicable to
this Note from the effective date thereof, unless otherwise prohibited by
applicable law; and "Prime Rate" means, for any day, the fluctuating rate of
                     ----------- 
interest announced by Bank (or its successor) as its "Prime Rate", provided
that Bank of, (or its successor) may from time to time announce other reference
rates for calculating interest, which shall not be applicable to this Note;
provided further that the Prime Rate

                                     - 2 -
<PAGE>
 
may not (i) be the only general reference rate used by Bank of (or its
successor) in calculating interest, (ii) correspond with increases or decreases
in interest rates charged by other lenders or market rates in general, or (iii)
be the lowest rate at which interest is charged by Bank (or its successor); and
provided further still that if the Prime Rate ceases to be available for any
reason, then the Bank or any subsequent holder of this Note may select a new
interest rate based upon comparable information which shall then be used as the
reference rate for calculating interest with regard to Prime Loans hereunder.

          In consideration of the Bank's commitment to make advances hereunder,
the Borrower agrees to pay to the Bank a commitment fee of one-fourth of one
percent (1/4%) per annum on the daily average unused amount of the maximum
amount committed hereunder, payable quarterly in arrears on the last day of each
calendar quarter and on the Maturity Date.

          In the event the Bank shall determine (which determination shall be
presumed correct absent evidence of error) that:

          (i)    Unavailability.  On any date for determining the appropriate
                 --------------                                              
     Adjusted Eurodollar Rate or Adjusted CD Rate for any Interest Period, that
     by reason of any changes arising on or after the date of this Note
     affecting the interbank Eurodollar market or the certificate of deposit
     market, dollar deposits in the principal amount requested are not generally
     available in the interbank Eurodollar Market, in the case of Eurodollar
     Loans, or quotes for determination of the Adjusted CD Rate are unavailable,
     in the case of Adjusted CD Loans, or adequate, and fair means do not exist
     for ascertaining the applicable interest rate on the basis provided for in
     the definition of Adjusted Eurodollar Rate or Adjusted CD Rate,
     respectively; then Eurodollar Loans or Adjusted CD Loans, as appropriate,
     will no longer be available, and requests for a Eurodollar Loan or Adjusted
     CD Loans shall be deemed requests for Prime Loans, until such time as the
     Bank shall notify the Borrower that the circumstances giving rise thereto
     no longer exist.

          (ii)   Increased Costs.  At any time, that the Bank shall incur
                 ---------------                                         
     increased costs or reductions in the amounts received or receivable
     hereunder with respect to any Eurodollar Loans or Adjusted CD Loans because
     of any change since the date of this Note in any applicable law,
     governmental rule, regulation, guideline or order (or in the interpretation
     or administration thereof and including the introduction of any new law or
     governmental rule, regulation, guideline or order) including without

                                     - 3 -
<PAGE>
 
     limitation  the imposition, modification or deemed applicability of any
     reserves, deposits or similar requirements as related to Eurodollar Loans
     or Adjusted CD Loans (such as, for example, but not limited to, a change in
     official reserve requirements, but, in all events, excluding reserves
     required under Regulation D to the extent included in the computation of
     the Adjusted Eurodollar Rate or Adjusted CD Rate, as appropriate); then the
     Borrower shall pay to the Bank promptly upon written demand therefor, such
     additional amounts (in the form of an increased rate of, or a different
     method of calculating, interest or otherwise as the Bank may determine in
     its reasonable discretion) as may be required to compensate the Bank for
     such increased costs or reductions in amounts receivable hereunder (written
     notice as to the additional amounts owed to the Bank, showing the basis for
     calculation thereof, shall, absent evidence of error, be binding on all
     parties hereto).

          (iii)  Illegality.  At any time, that the making or continuance of any
                 ----------                                                     
     Eurodollar Loan has become unlawful by compliance by the Bank in good faith
     with any law, governmental rule, regulation, guideline or order (or would
     conflict with any such governmental rule, regulation, guideline or order
     not having the force of law even though the failure to comply therewith
     would not be unlawful), or has become impractical as a result of a
     contingency occurring after the date of this Note which materially and
     adversely affects the interbank Eurodollar market; then Eurodollar Loans
     will no longer be available, requests for Eurodollar Loans shall be deemed
     requests for Prime Loans and the Borrower may, and upon direction of the
     Bank, shall, as promptly as possible and, in any event within the time
     period required by law, have any such Eurodollar Loans then outstanding
     converted into Prime Loans.

     If the Bank shall have determined that the adoption or effectiveness of any
applicable law, rule or regulation regarding capital adequacy, or any change
therein, or any change after the date hereof in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation of administration thereof, or compliance
by the Bank with any request or directive regarding capital adequacy (whether or
not having the force of law) of any such authority, central bank or comparable
agency, has the effect of materially reducing the rate of return on the Bank's
capital or assets as a consequence of its commitments or obligations hereunder
to a level below that which the Bank could have achieved but for such adoption,
effectiveness, change or compliance (taking into consideration the Bank's
policies with respect to capital adequacy), then from time to time, within 15
days after demand by the Bank the Borrower shall pay to the Bank such additional
amount or amounts as will compensate the Bank for such reduction.  Upon
determining in good faith than any additional amounts will be payable pursuant
to this Section, the Bank will give prompt written notice thereof to the
Borrower, which notice shall set forth the basis of the calculation of such
additional amounts, although the failure to give any such notice shall not
release or diminish any of the Borrower's obligations to pay additional amounts
pursuant to this paragraph.  Determination by the Bank of amounts owing under
this paragraph shall, absent evidence of error, be binding on the parties
hereto.  Failure on the part of the Bank to demand compensation for any period
hereunder shall not constitute a waiver of the Bank's rights to demand any such
compensation in such period or in any other period.  Notwithstanding the
foregoing, amounts will be owing and payable under this paragraph only if it is
the Bank's general policy and practice to charge similarly situated borrowers
under such capital adequacy provisions.

     All payments made by the Borrower hereunder will be made without (but
without waiving any rights with respect to) setoff or counterclaim.  Promptly
upon notice from the Bank to the Borrower, the Borrower will pay, prior to the
date on which penalties attach thereto, but without duplication, all present and
future, stamp and other taxes, levies, or costs and charges whatsoever imposed,
assessed, levied or collected on or in respect of advances hereunder solely as a
result of the interest rate being determined by reference to the Adjusted
Eurodollar Rate or Adjusted CD Rate, as appropriate, and/or the provisions of
this Note relating to the Adjusted Eurodollar Rate or Adjusted CD Rate, as
appropriate, and/or the recording, registration, notarization or other
formalization of any thereof and/or any payments of principal, interest or other
amounts made on or in respect of advances hereunder when the interest rate is
determined by reference to the Adjusted Eurodollar Rate or Adjusted CD Rate, and
any increases thereof (all such taxes, levies, costs and charges being herein
collectively call "Taxes"), provided that Taxes shall not include taxes imposed
                   -----                                                       
on or measured by the income of the Bank by the United States of America or any
political subdivision or taxing authority thereof or therein, or taxes on or
measured by the overall net income of any foreign office, branch or Subsidiary
of the Bank by any foreign country of subdivision thereof in which that office,
branch or Subsidiary is doing business.  Promptly

                                     - 4 -
<PAGE>
 
after the date on which payment of any such Tax is due pursuant to applicable
law, the Borrower will at the request of the Bank, furnish to the Bank evidence,
in form and substance satisfactory to the Bank, that the Borrower has met its
obligations under this paragraph.  The Borrower will indemnify the Bank against,
and reimburse the Bank on demand for, any Taxes, as determined by the Bank in
its good faith discretion.  The Bank shall provide the Borrower with appropriate
receipts for any payments or reimbursements made by the Borrower pursuant to
this Section.

     The Borrower covenants and agrees that it will provide to the Bank (i)
detailed company-prepared consolidated financial statements of the Borrower
containing a balance sheet and income statement (with quarterly and year-to-date
figures) certified by the chief financial officer of the Borrower to be correct
and accurate in all material respects within 45 days of the end of each fiscal
quarter, and (ii) detailed audited consolidated financial statements of the
Borrower containing a balance sheet and income statement with an unqualified
opinion of independent certified public accountants of national standing
reasonably acceptable to the Bank within 120 days of the end of each fiscal
year.

     The following shall constitute Events of Default hereunder: (i) the failure
                                    -----------------                           
by the Borrower to make payment of principal on demand or when and as otherwise
due, (ii) the occurrence and continuance of an event of default under any other
note or agreement relating to indebtedness for borrowed money owing by the
Borrower which results in, or would permit, without further notice and/or the
expiration of any grace or cure periods, acceleration of such indebtedness for
borrowed money in an aggregate amount in excess of $1,000,000, (iii) failure to
observe or comply with any other covenants or provisions contained herein and
such failure shall continue for 30 days from the earlier of an officer of the
Borrower becoming aware thereof or receipt of written notice thereof from the
Bank, (iv) the filing of an action in bankruptcy or insolvency by the Borrower,
(v) the filing of an action in bankruptcy or insolvency against the Borrower and
the continuance of such action undismissed, unstayed and in effect for 60 days
from the date of filing, or (vi) the failure by B.F. Goodrich ("Goodrich") to
                                                                --------     
abide by the terms of that comfort letter dated February 17, 1997, given by
Goodrich to the Bank. Upon the occurrence of an Event of Default hereunder, the
unpaid principal amount of all advances under this Note, together with all
accrued but unpaid interest hereon, may become, or may be declared to be, (or in
the case of any Event of Default resulting from items (iv) or (v) relating to
the bankruptcy or insolvency of the Borrower, shall, without action on the part
of the Bank, become), immediately due and payable, without presentation, demand,
protest or notice of any kind, all of which are hereby waived by the Borrower.
In addition, if Goodrich fails to maintain a controlling interest in the
outstanding capital stock of the Borrower, the amounts as set forth in the
immediately preceding sentence shall immediately become due and payable although
the failure of Goodrich to maintain such a controlling interest shall not
constitute an Event of Default under this paragraph.

     In the event amounts under this Note are not paid when due at any stated or
accelerated maturity, interest on all amounts owing hereunder shall accrue at a
rate 2% in excess of the rate otherwise applicable but not in excess of the rate
permitted by law (such rate sometimes being referred to herein as the "Default
                                                                       -------
Rate").  The Borrower agrees to pay, in addition to the principal and interest,
- ----                                                                           
all costs of collection, including reasonable attorneys fees.

     The Bank agrees not to assign or otherwise transfer this Note, other than
to a subsidiary of affiliate of the Bank, without the prior written consent of
the Borrower.

     Notices hereunder shall be deemed given and be effective (i) when
delivered, (ii) when transmitted via telecopy to the number set out below, (iii)
the day following the day on which the same has been delivered prepaid to a
reputable national overnight air courier service, or (iv) the third business day
following the day on which the same is sent by certified or registered mail,
postage prepaid, in each case to the respective parties at the address set forth
below, or at such other address as such party may specify by written notice to
the other parties hereto:

                                     - 5 -
<PAGE>
 
     if to the Borrower:  DTM Corporation
                          1611 Headway Circle
                          Building 2
                          Austin, Texas 78754
                          Attn:  Greg Logwinuk
                          Telephone:  (512) 339-2922
                          Telecopy:   (512) 339-0634

     if to the Bank:      Texas Commerce Bank
                          National Association
                          P.O. Box 550
                          Austin, Texas 78789-0001
                          Attn: Donna Tanner-Day
                          Telephone:  (512) 479-2815

     No delay or omission on the part of the holder of this Note in exercising
any right hereunder shall operate as a waiver of such right or of any right of
such holder nor shall any delay, omission or waiver on any one occasion be
deemed a bar to or  waiver of the same or any other right on any future
occasion.  The Borrower assents to any one or more extensions or postponements
of the time of payment or any other indulgences, to any substitutions, exchanges
or releases of collateral if at any time there is collateral available to the
holder of this Note, and to the additions or releases of any other parties or
persons primarily or secondarily liable.

     BORROWER AND ALL OTHER PARTIES LIABLE FOR THIS NOTE WAIVE DEMAND, NOTICE OF
INTENT TO DEMAND, PRESENTMENT FOR PAYMENT, NOTICE OF NONPAYMENT, PROTEST, NOTICE
OF PROTEST, GRACE, NOTICE OF DISHONOR, NOTICE OF INTENT TO ACCELERATE MATURITY,
NOTICE OF ACCELERATION OF MATURITY, AND DILIGENCE IN COLLECTION.  EACH MAKER,
SURETY, ENDORSER, AND GUARANTOR OF THIS NOTE WAIVES AND AGREES TO ONE OR MORE
EXTENSIONS FOR ANY PERIOD OR PERIODS OF TIME, AND ANY PARTIAL PAYMENTS, BEFORE
OR AFTER MATURITY, WITHOUT PREJUDICE TO THE HOLDER OF THIS NOTE.  EACH MAKER,
SURETY, ENDORSER, AND GUARANTOR WAIVES NOTICE OF ANY AND ALL RENEWALS,
EXTENSIONS, REARRANGEMENTS, AND MODIFICATIONS OF THIS NOTE.

     THIS NOTE HAS BEEN EXECUTED AND DELIVERED IN TEXAS, AND SHALL BE CONSTRUED
IN ACCORDANCE WITH THE APPLICABLE LAWS OF THE STATE OF TEXAS AND THE LAWS OF THE
UNITED STATES OF AMERICA APPLICABLE TO TRANSACTIONS IN TEXAS.  IN ADDITION, THE
BORROWER HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY
LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS NOTE AND THE ADVANCES
HEREUNDER AND CONSENTS TO THE JURISDICTION OF FEDERAL AND STATE COURTS LOCATED
IN TRAVIS COUNTY, TEXAS.

     THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, OR CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.


                                     - 6 -
<PAGE>
 
       IN WITNESS WHEREOF, the Borrower has caused this Note to be executed
under seal and delivered by its duly authorized officer as of the date first
above written.

                                      DTM CORPORATION

ATTEST:
                                      By  /s/ JOHN S. MURCHISON, III
                                        ---------------------------------

By /s/ UDAY BELLARY
- -------------------------
                                                  President & CEO
 _______ Secretary                         ------------------------------
                                              DTM Corporation



                                     - 7 -

<PAGE>
 
                                                                   EXHIBIT 10.10
 
                                PROMISSORY NOTE
                                ---------------

$ 4,000,000                                                      JANUARY 1, 1997

     FOR VALUE RECEIVED, the undersigned maker, DTM Corporation, a Texas
corporation (the "Borrower") promises to pay to the order of THE B.F.GOODRICH
COMPANY, a New York corporation ("Lender"), at its principal office and place of
business in Richfield, Ohio, or at such other place as the holder hereof may
from time to time designate in writing, the principal amount outstanding
hereunder, which shall not exceed at any time, a maximum of Four Million Dollars
($4,000,000), as evidenced on Schedule A hereto from time to time, and as
described below (the "Loan"), on the earlier of July 31, 1998 or the date as of
which the Borrower receives the proceeds of an initial public stock offering
(the "Maturity Date"). This promissory note is given in replacement for the
promissory notes given by Borrower to Lender on November 15, 1996, April 26,
1996 and July 31, 1996, for $2,000,000, $1,000,000 and $1,000,000, respectively.

     The Borrower shall pay interest on the unpaid principal amount of the Loan
from time to time from the date outstanding until paid in full at a rate per
annum equal to the prime commercial lending rate (or the base rate applicable to
general commercial borrowings, or the equivalent rate in effect at the time in
question, as the case may be), of Citibank, NA, New York, New York as published
from time to time in the Wall Street Journal. The interest rate shall be
adjusted quarterly on the first day of each calendar quarter on which rates are
quoted. Such interest shall be payable quarterly on the last day of each
calendar quarter, commencing on March 31, 1997, and at maturity. Interest
hereunder shall be computed on the basis of a year of 360 days and twelve 30-day
months. Any overdue payment of principal and, to the extent permitted by law,
interest on the Loan shall bear interest, payable on demand, at a rate per annum
equal to the rate of interest applicable prior to maturity plus one percent
(1%).

     Borrower shall have the right at any time and from time to time to prepay
this Note in whole or in part, without premium or penalty, provided that three
day's notice is given prior to the effective date of prepayment and further
provided that any and all prepayments of principal shall be accompanied by
payment of all interest then accrued on the principal amount so prepaid.  Any
sums received by the Lender or other holder hereof shall be applied first to
accrued interest.

     If any payment of principal or interest on this Note shall become due on a
day on which banks in the State of Texas or New York are not open for business,
such payment shall be made on the next succeeding day on which banks in both of
the State of Texas and the State of New York are open (a "Business Day"), and
such extension of time shall in such case be included in computing interest in
connection with such payment.
<PAGE>
 
     The principal outstanding hereunder from time to time shall be recorded by
the Lender on Schedule A to this note, a copy of which, when delivered to the
Borrower, shall be conclusive as to the amounts outstanding absent evidence of
error.

     If any of the following events ("Events of Default") shall occur and be
continuing:

     (a)  Borrower fails to pay principal of this Note as and when due;

     (b)  Borrower fails to pay interest on this Note within 5 days of the date
     due;

     (c)  Borrower becomes insolvent (however, such insolvency may be evidenced)
     or proceedings are instituted by or against Borrower under the United
     States Bankruptcy Code or under any bankruptcy, reorganization or
     insolvency law or other law for the relief of debtors and are consented to
     by Borrower or are not dismissed within 60 days of such institution,

then, in any such case, Lender may, by written notice to Borrower: a)  declare
the outstanding principal amount of this Note to be forthwith due and payable,
together with accrued interest, whereupon the same shall become forthwith due
and payable without further notice, demand, protest, presentment or any other
notice or demand whatsoever, all of which are hereby waived by Borrower; and (b)
proceed to pursue any other right or remedy to which it may be entitled under
applicable law.

     This Note shall be governed and construed according to the laws of the
State of Ohio.  It is expressly stipulated and agreed to be the intent of the
Borrower and the Lender at all times to comply with the applicable Ohio law
governing the maximum rate or amount of interest payable on this Note or the
indebtedness evidenced hereby. If the applicable law is ever judicially
interpreted so as to render usurious any amount called for under this Note, or
contracted for, charged, taken, reserved or received with respect to such
indebtedness, or if any prepayment by the Borrower results in the Borrower
having paid any interest in excess of that permitted by applicable law, then it
is the Borrower's and the Lender's express intent that all excess amounts
theretofore collected by the Lender be credited on the principal balance of this
Note (or, if this Note has been or would thereby be paid in full, refunded to
the Borrower), and the provisions of this Note immediately be deemed reformed
and the amounts thereafter collectible hereunder and thereunder reduced, without
the necessity of the execution of any new document, so as to comply with the
applicable law, but so as to permit the recovery of the fullest amount otherwise
called for hereunder.

                                     - 2 -
<PAGE>
 
     DTM CORPORATION has caused this Note to be executed on its behalf by a duly
authorized officer as of January 1, 1997.

     THE UNDERSIGNED WAIVES PRESENTMENT AND DEMAND FOR PAYMENT, NOTICE OF INTENT
TO ACCELERATE MATURITY, NOTICE OF ACCELERATION OF MATURITY, PROTEST AND NOTICE
OF PROTEST AND NON-PAYMENT, AND THE BRINGING OF SUIT AND DILIGENCE IN TAKING ANY
ACTION TO COLLECT ANY SUMS OWING HEREUNDER.


                                    DTM CORPORATION

                                    By:  /s/ JOHN S. MURCHISON III
                                       -------------------------------
                                    Name:  JOHN S. MURCHISON III
                                         -----------------------------
                                    Title:   PRSIDENT
                                          ----------------------------



     THE STATE OF TEXAS  )
                         ) SS
     COUNTY OF TRAVIS    )


BEFORE ME, the undersigned authority on this 16th    day of November, 1995,
                                            --------                       
personally appeared   Gregory A. Logwinuk    of DTM Corporation, a Texas
                    ------------------------                            
corporation, known to me to be the person and officer whose name is subscribed
to the foregoing instrument and being by me first duly sworn acknowledged to me
that he executed the same as the act and deed of such corporation for the
purposes and consideration therein expressed, and in the capacity therein
stated.

                                      /s/ Kathleen Klein
                                     --------------------------
                                     Notary Public in and for
                                     Travis County, Texas

                                     - 3 -

<PAGE>
 
                                                                 
                                                              EXHIBIT 11.1     
             
          STATEMENT OF COMPUTATION OF EARNINGS (LOSS) PER SHARE     
 
<TABLE>   
<CAPTION>
                                                                      1996
                                                         1996      AS ADJUSTED
                                                      -----------  -----------
<S>                                                   <C>          <C>
Pro forma net loss(1)................................ $(6,156,000) $(6,156,000)
  Plus interest on debt repaid with proceeds from
   offering(2).......................................         --     1,087,000
                                                      -----------  -----------
Pro forma net loss as adjusted....................... $(6,156,000) $(5,069,000)
                                                      ===========  ===========
Shares:
  Weighted average number of shares outstanding......   4,331,247    4,331,247
  Dilutive effect of options to be issued(3).........     443,471      443,471
  Shares issued in the Offering used to repay
   outstanding debt(4)...............................         --     1,448,618
                                                      -----------  -----------
  Total shares used in computing pro forma net loss
   per share.........................................   4,774,718    6,223,336
                                                      ===========  ===========
Pro forma net loss per share (primary & fully
 dilutive)........................................... $     (1.29) $     (0.81)
                                                      ===========  ===========
</TABLE>    
- --------
   
(1) Computed on a stand alone basis, without allocation of income tax benefit
    from BF Goodrich.     
   
(2) Reflects elimination of historically incurred interest expense related to
    debt to be repaid with proceeds from the offering.     
   
(3) Reflects the shares of Common Stock issuable to employees related to
    exercisable options (at exercise prices substantially less than the
    offering price) that will be outstanding with the closing of the offering
    under the Equity Appreciation Plan, less shares assumed to be repurchased
    using the treasury stock method.     
   
(4) Reflects that number of shares to be offered, the net proceeds from which
    are necessary to fund debt repayments (assuming such shares are sold at an
    offering price of $12 per share).     
       

<PAGE>
 
                                                                   EXHIBIT 23.2
                        
                     CONSENT OF INDEPENDENT AUDITORS     
   
  We consent to the reference to our firm under the caption "Experts" and to
the use of our report dated February 13, 1997, in Amendment No. 1 to the
Registration Statement (Form S-1, No. 333-04173) and related Prospectus of DTM
Corporation dated February 18, 1997.     
 
                                            Ernst & Young LLP
Austin, Texas
   
February 17, 1997     

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996
<PERIOD-START>                             JAN-01-1995             JAN-01-1996
<PERIOD-END>                               DEC-31-1995             DEC-31-1996
<CASH>                                             756                     329
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    3,204                   7,845
<ALLOWANCES>                                      (263)                   (640)
<INVENTORY>                                      2,143                   4,835
<CURRENT-ASSETS>                                 6,593                  12,964
<PP&E>                                           7,613                   9,159
<DEPRECIATION>                                  (4,966)                 (6,102)
<TOTAL-ASSETS>                                  10,639                  17,897
<CURRENT-LIABILITIES>                            6,157                  11,342
<BONDS>                                              0                       0
                                0                       0
                                          0                       0
<COMMON>                                             1                       1
<OTHER-SE>                                      (3,919)                 (8,486)
<TOTAL-LIABILITY-AND-EQUITY>                    10,639                  17,897
<SALES>                                         12,632                  22,070
<TOTAL-REVENUES>                                14,211                  24,379
<CGS>                                            8,803                  13,021
<TOTAL-COSTS>                                    9,676                  14,445
<OTHER-EXPENSES>                                10,141                  15,024
<LOSS-PROVISION>                                    60                     389
<INTEREST-EXPENSE>                                 530                   1,066
<INCOME-PRETAX>                                 (6,136)                 (6,156)
<INCOME-TAX>                                     2,138                   1,667
<INCOME-CONTINUING>                             (3,998)                 (4,489)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    (3,998)                 (4,489)
<EPS-PRIMARY>                                        0                   (1.29)
<EPS-DILUTED>                                        0                    1.29
        

</TABLE>


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