SMD (StudioModel Data) is a plain-text file format used for 3D models, primarily in Valve's Source and GoldSrc engines. SMD is also known to be used by Sauerbraten and third party tools for The Sims and Mount & Blade. It stores geometry, skeletal animations, and optionally vertex animations in a simple, easy-to-parse structure.
- Reference Models: Default pose with geometry and bone hierarchy.