FBX is a popular 3D file format that was originally developed by Kaydara for MotionBuilder, acquired by Autodesk Inc in 2006. It is now one of the main 3D exchange formats as used by many 3D tools. Even though Autodesk publishes "free" SDK for FBX, its license and the software itself remains fully closed. FBX has a text based (ascii) and a ...