EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the Registration Statements of 3D Systems Corporation on Form S-8 (Nos. 333-79767, 333-58903, 333-11865 and the S-8 filed on April 30, 1990) of our reports dated February 14, 2000, relating to the consolidated financial statements and financial statement schedule of 3D Systems Corporation which are included in this Annual Report on Form 10-K. PricewaterhouseCoopers LLP Woodland Hills, California March 30, 2000