by SketchUP ( IFC imported from REVIT export)
SKP (Sketchup, filesize: 119 MB), BLEND (Blender, filesize: 10.1 MB), OBJ (OBJ, filesize: 73.8 MB), FBX (Autodesk FBX, filesize: 23.2 MB), MAX (Autodesk 3ds Max, filesize: 66.5 MB), DAE (Collada, filesize: 140 MB), 3DS (3D Studio, filesize: 35.7 MB)