drc
What is a .drc file?
application/vnd.google.draco
DRC is a common extension for a Google Draco compressed geometry stream. Draco entropy-encodes mesh or point-cloud connectivity and attributes such as position, normal, colour, and texture coordinates; the file is a compact geometry payload rather than a complete scene with materials and external resources.
How to use a .drc file
Use an example .drc file to test signature and decoder handling, bounded decompression, attribute discovery, mesh-versus-point-cloud detection, and semantic comparison of decoded geometry counts and bounds instead of judging success by the extension alone.