Fourth Amendment To Lease Agreement

FOURTH AMENDMENT TO LEASE AGREEMENT

THIS FOURTH AMENDMENT TO LEASE AGREEMENT (" Fourth Amendment ") is hereby made and entered into this 26 th day of February, 2007, by and between KDC-CAROLINA INVESTMENTS 3, LP, a Delaware limited partnership (" Landlord "), and 3D SYSTEMS CORPORATION, a Delaware corporation (" Tenant ").

R E C I T A L S :

WHEREAS, Landlord and Tenant have heretofore entered into that certain Lease Agreement dated February 8, 2006 (the " Lease Agreement "); and

WHEREAS, Landlord and Tenant amended the Lease Agreement pursuant to the terms and conditions of that certain First Amendment to Lease Agreement dated effective as of June 15, 2006 (the " First Amendment "), that certain Second Amendment to Lease Agreement dated effective as of October 6, 2006 (the " Second Amendment ") and that certain Third Amendment to Lease Agreement dated effective as of December 18, 2006 (the " Third Amendment "); and

WHEREAS, Exhibit F to the Lease Agreement provides, among other things, that in the event that certain Scope Changes (as defined in Exhibit F to the Lease Agreement) occur, either (a) Base Rent (as defined in the Lease Agreement) will be adjusted as provided for in Exhibit F, or (b) Tenant shall have the right to fund all or such portion of such excess costs in which case Base Rent will not be adjusted as a result of such Tenant expenditures; and

WHEREAS, Landlord and Tenant desire to further amend the Lease Agreement, as amended by the First Amendment, Second Amendment and Third Amendment, as set forth in this Fourth Amendment and to set forth agreed upon adjustments to Base Rent in order to execute an Acknowledgment Letter (in the form of Exhibit E to the Lease Agreement) as required pursuant to the terms of the Lease Agreement.

A G R E E M E N T :

NOW, THEREFORE, for and in consideration of the premises and Ten Dollars and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Landlord and Tenant hereby agree as follows:

1. Defined Terms . All capitalized but undef ...