fbx
What is a .fbx file?
application/octet-stream
FBX is Autodesk's scene-interchange format for meshes, transforms, materials, animation, cameras, lights, and hierarchy. It has both text and binary encodings; the binary form begins with a recognizable header and stores a versioned tree of typed records whose connections define relationships between scene objects.
How to use a .fbx file
Use an example .fbx file to test header and version detection, node traversal, geometry and transform extraction, unit conversion, and semantic comparison of vertex bounds and face counts after conversion.