Caligari trueSpace 3D Object (.cob)
The COB file extension stands for Caligari trueSpace 3D Object, a proprietary format used by the trueSpace 3D modeling and animation software. Introduced by Caligari Corporation, trueSpace was popular in the 1990s and early 2000s for creating and rendering 3D graphics. COB files store 3D geometry, material properties, and other relevant details, enabling efficient optimization and rendering of 3D models. This format played a significant role in the development of 3D graphics and animation during its peak usage.