C# .NET 3D File Manipulation and Conversion API can load and save 3DS, 3MF, AMF, FBX, DFX, OBJ, PLY, STL, USD, U3D and other formats...Collada DRC Google Draco Including mesh/point cloud support DXF AutoCAD...OBJ Wavefront Obj Including mesh/point cloud support. PDF 3D...