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...3D for .NET - C# 3D file manipulation and... PDF 3D PDF Only supports standard U3D embedded 3D content in...