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                                                                    EXHIBIT 99.1

            3D Systems and DTM Corporation Announce Plans to Merge

     Acquisition Will Secure 3D Systems' Leadership in the Solid Imaging
Industry

     VALENCIA, Calif. and AUSTIN, Tx.--(BUSINESS WIRE)--April 3, 2001--3D
Systems Corp. (Nasdaq:TDSC) and DTM Corporation (Nasdaq:  DTMC) announced today
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that they have signed a definitive merger agreement under which 3D Systems will
purchase all of the outstanding shares of common stock of DTM for $5.80 per
share in cash. The acquisition will bring together two leading companies from
the solid imaging industry, combining their complementary products and customers
and extending 3D Systems' global reach. The transaction will value DTM at
approximately $45 million (before transaction costs).

     Under the agreement, which has been unanimously approved by the boards of
directors of both companies, 3D Systems will commence a tender offer for any and
all outstanding shares of DTM common stock no later than five business days
after receiving financing commitments in an amount sufficient to fund the
acquisition and provide for 3D's ongoing working capital needs. 3D Systems
anticipates that it will arrange for the financing commitments on or prior to
May 3, 2001, and that the tender offer would close in June 2001. The tender
offer will be followed by a merger in which each share of DTM common stock not
tendered through the offer will convert to a right to receive $5.80 in cash. All
employee options will be converted into a right to receive cash at the same
value as the common stock (less the applicable exercise price) as part of the
merger. After the merger, DTM will become a wholly owned subsidiary of 3D
Systems.

     The tender offer will be subject to the receipt by 3D Systems of the
financing necessary to complete the transaction, as well as a number of
customary conditions, including the tender of at least 67 percent of DTM's
outstanding shares of common stock. DTM's chief executive officer and DTM
Acquisition Corp., DTM's largest shareholder, representing approximately 49% of
DTM's outstanding shares of common stock, have entered into agreements to tender
their shares pursuant to the tender offer.

     On a pro forma basis, the combined companies had approximately $150 million
in revenues in 2000. 3D Systems expects that the combination will result in
significant operating benefits and be accretive (after excluding integration and
other costs of combining the two companies) during the first year of operations.
It is expected that DTM will continue to maintain its presence in Austin, Texas
following the offer. John Murchison, President and Chief Executive Officer of
DTM, is expected to join the 3D Systems Board of Directors following the closing
of the transaction.

     "We are very pleased to join with DTM to create the preeminent solid
imaging company in the world," stated Brian K. Service, president and CEO of 3D
Systems. "We are currently the leading company in the solid imaging arena. We
believe our merger with DTM will enable us to
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continue our growth into the rapidly developing market for mass customization,
rapid tooling, and direct or indirect in-line manufacturing processes which
requires new materials such as metal, plastic, composites and ceramics to allow
us to offer the broadest range of solid imaging applications," he added.

     John S. Murchison, III., President and CEO of DTM, said, "The opportunity
for DTM to join 3D Systems is an exciting development for our customers,
shareholders and employees.  We believe the merger will result in a company that
is uniquely equipped with the technologies, product solutions and resources to
develop and grow the rapid prototyping and small volume manufacturing markets.
We are looking forward to working closely with 3D Systems' management to
complete the merger and integration of our respective companies."

     A.G. Edwards & Sons, Inc. acted as financial adviser for 3D Systems in this
transaction, and Hoak Breedlove Wesneski & Co. acted as financial adviser to
DTM.

     3D Systems will conduct a conference call to discuss the merger on Tuesday,
April 3, 2001 at 3:00 p.m. EDT.  To access the call, dial 800-251-3185
(international callers: 415-908-6299).

ABOUT 3D SYSTEMS

     3D Systems, headquartered in Valencia, California, provides solid imaging
products and services that substantially reduce the time and cost required to
design, test and manufacture products. The company's systems utilize patented
technologies that create physical objects from digital input.

     3D Systems currently offers the ThermoJet(R) office printer and SLA(R)
industrial systems, which include proprietary software and materials. Product
pricing in the U.S. begins at $49,995 for the company's entry-level printer and
extends up to $799,000 for its feature-rich industrial SLA system. The company
also licenses the 3D Keltool(R) process, a complementary application that
produces injection molding and die casting inserts from SLA system master
patterns.  In February 2001, 3D Systems announced it acquired OptoForm, a French
company that developed stereolithography systems using paste materials.

     Based in Valencia, Calif., 3D Systems was founded in 1986 and is recognized
as the world technology and market leader in solid imaging. For additional
information, visit the company's website at www.3dsystems.com or phone
(888) 337-9786, ext. 763. For an investor packet, call the company's shareholder
communications service at (800) 757-1799.

[Note to editors: ThermoJet, SLA, Keltool and the 3D logo are registered
trademarks of 3D Systems.]

ABOUT DTM CORPORATION

     DTM develops, manufactures, and markets advanced rapid prototyping and
manufacturing systems, including the Sinterstation 2500plus.  A growing number
of manufacturers and service bureaus worldwide use these systems to rapidly
create three-dimensional prototypes, parts, molds, tooling, and casting
patterns.
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     All Sinterstation systems utilize a process called  selective laser
sintering (SLS) to create 3-D objects from Computer Aided Design (CAD) data.
The Sinterstation creates the part in a matter of hours using a CO2 laser to
fuse together layers of powdered plastic, metal, or ceramic powders.  The
results are durable 3-D parts produced in a fraction of the time it would
typically take using other traditional methods.

     Among the companies currently using Sinterstations are manufacturers such
as BMW, Boeing, Pitney Bowes, Rockwell International, Volvo Penta, and others.
In addition, numerous service bureaus throughout the world include Sinterstation
systems in their offerings to companies with only an occasional need for rapidly
produced functional prototypes and parts.  Parts and prototypes made on
Sinterstation systems also are used in non-industrial settings, such as science
and medicine.  For more information on DTM's systems, customers, and
applications, visit the company's website at www.dtm-corp.com.

Sinterstation(R), and SLS(R) are registered trademarks and DuraForm(TM) is a
trademark of DTM Corporation.

Notice to Read Tender Offer Documents:

     A Tender Offer Statement on Schedule TO will be filed by 3D Systems and a
Solicitation/Recommendation Statement on Schedule 14D-9 will be filed by DTM
with the Securities and Exchange Commission (SEC). You are urged to read the
Tender Offer Statement and any other relevant documents to be filed with the
SEC. The Tender Offer Statement, the solicitation/recommendation statement on
Schedule 14D-9 and other documents filed with the SEC will contain important
information that you should consider before making any decision regarding the
tender offer and related transactions. You may obtain a free copy of the Tender
Offer Statement and other documents filed by 3D Systems and DTM with the SEC at
the SEC's web site at www.sec.gov. The Tender Offer Statement and other
documents to be filed with the SEC by 3D Systems will be available free of
charge from 3D Systems by directing a request to 3D Systems Corp, 26081 Avenue
Hall, Valencia, CA, 91355. In addition, the Solicitation/Recommendation
Statement on Schedule 14D-9 and other documents to be filed with the SEC by DTM
may be obtained free of charge from DTM by directing a request to 1611 Headway
Circle, Building 2, Austin, TX, 78754.

Cautionary Note Regarding Forward Looking Statements

     Certain statements in this news release may constitute "Forward-Looking
Statements" within the meaning of the Private Securities Litigation Reform Act
of 1995.  Such forward-looking statements involve known and unknown risks,
uncertainties and other factors that may cause the actual results, performance
and achievement of 3D Systems Or DTM to be materially different from any future
results, performance or achievement expressed or implied by such forward-looking
statements.  Factors that may cause actual results to differ from the forward-
looking statements contained in this release and that may affect each company's
prospects in general include, but are not limited to:  changes in general and
industry-wide economic and business conditions; the availability of capital on
acceptable terms; the availability of financing in amounts necessary to allow 3D
Systems to commence the tender and to purchase the DTM shares; actions of
competitors and customers; the uncertain outcome of litigation in which the
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parties are or may become involved, including the ongoing litigation between DTM
and EOS GmbH; the impact of competitive products and pricing; the availability
and acceptance of 3D Systems' And DTM's products generally; the extent to which
the companies are able to develop new products and markets for their products;
and such other factors as are described in the companies' filings with the
Securities And Exchange Commission, including Annual Reports on Form 10-K For
The Year Ended December 31, 2000.


For more information   CONTACT:

3D Systems
Jeff Krinks, 661/295-5600, ext. 2910
krinksj@3dsystems.com
or

For 3D Systems:

Self & Associates
Trudy Self, 818/880-5437
tmself@aol.com

Contact DTM Corporation, 1611 Headway Circle, Building 2, Austin, TX, USA 78754;
phone +1-512-339-2922; fax +1-512-832-6753; web site: http://www.dtm-corp.com;
email marketing@dtm-corp.com.

Contact:

Geoff Kreiger +1-512-339-2922