1. Transform Your Products Viper are trademarks, and SLA is a registered trademark of 3D Systems Inc. © 2005 3D Systems, Inc. All rights reserved. The 3D logo, Buildstation, Lightyear, ShellWizard and Viper are trademarks, and SLA is a registered trademark of 3D Systems Inc. July 13, 2005 Nasdaq: TDSC www.3dsystems.com 3D Systems Corporation PC Controller and Electronics Suite Upgrade

2. Transform Your Products Page 2  New 2.8Ghz Pentium IV Industrial PC  1Gb Ram  100Gb hard drive  New AGP Graphics card with 128Mb RAM  New signal processing electronics  New EPROMs on I/O electronic boards  Windows XP Pro  Installation (not including travel) PC Controller and Electronics Suite - Upgrade Components

3. Transform Your Products Page 3 Reasons To Upgrade  Eliminate jump to rest issues with speed improvements of up to 30% in some cases  Smooth 3-D graphics with the new Buildstation ™ 5.5 software  Less issues with large build files  Comes with Windows XP Pro  Machine control PC capable of running 3D Lightyear ™ 1.5 software

4. Transform Your Products Page 4 Jump To Rest Improvements  In some cases, (mainly the Viper ™ HR SLA ® system with a large number of parts with small features), the I/O buffer would overflow and the laser would stop drawing until the buffer was flushed and reloaded.  This could happen many times per layer resulting in overall throughput dropping by as much as 30-50%

5. Transform Your Products Page 5 Jump To Rest Example

6. Transform Your Products Page 6 Throughput Increase Example 1: 118 Hearing Aid Shells  New PC, electronics plus parameter optimization decrease build times  New slicing increases quality  ShellWizard ™ software manages the process  118 Shells.003” layers, HR mode

7. Transform Your Products Page 7 Old Parameters

8. Transform Your Products Page 8 New PC and Electronics

9. Transform Your Products Page 9 Detailed Example 2: Shells, Viper HA SLA system - HR mode

10. Transform Your Products Page 10 Example 3: Viper SLA System - HR build mode New build time4hr 04 min Old build time 5hr 50 min Improvement1hr 46 min Improvement30%

11. Transform Your Products Page 11 Summary – Viper HR SLA system build mode  Scanning as much as 32% faster  However scanning is only 20-40% of total build time (23 vs 110 shells)  Therefore throughput is 5-30% faster depending on amount of scanning during a build  Faster scanning will have an improvement proportional to total scanning time in cases where jump to rest is an issue

12. Transform Your Products Page 12 Ordering Information Note: Customer must be eligible for Buildstation 5.5 software or there will be additional software upgrade charges

13. Transform Your Products Page 13 Saving calculation on PC upgrade alone  Simple hourly method  running a SLA System is approximately US$5500 per month  including depreciation, service, laser, resin, etc.  equate to $35 per hour on a one shift 5 day week  One hour of build time savings per shift would be $35 x 5 x 52 weeks = $9,100 per year  If the machine is run for 3 shifts the savings would increase  Capacity method  The capacity of each machine is increased 10%  10% of the cost of a Viper HA SLA system is $18-20K