COB

COB format is a 3D model file format originally developed by Caligari (now TrueSpace) for its 3D modeling software.

The COB file format is relatively simple and suitable for storing static geometric models and simple material information.

It does not support complex animations or skeletal systems and is usually used for static scenes or simple 3D model storage.

Although not as popular as some more general formats (such as OBJ or FBX), it still has some value in specific modeling software or old 3D applications.