826 3DM 4 openNURBS (4), Rhino 3D Model (4) Model Full The 3DM (openNURBS) format is a 3D model representation based on non-uniform rational B-Splines (NURBS). The file format is defined by an open source C++ toolkit that reads and writes openNURBS models. Binary Little-endian (Intel) 01 Sep 2006 131 Digital Library Research Group / MIT Libraries 22 Oct 2008 22 Oct 2008 x-fmt/432 PUID 3dm File extension 214 3DM 4 Header with version no. 1 Absolute from BOF 0 Little-endian 33442047656F6D657472792046696C6520466F726D617420202020202020203401000000 Is previous version of 1667 3DM Is subsequent version of 831 3DM