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...Data HTML Hyper-Text Markup Language MA Autodesk Maya ASCII format...and 9. STL Standard Triangle Language U3D Universal3D USD Universal...