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