Crowbar is the gold standard for de-compiling Source Engine models. It takes the .mdl , .vvd , and .vtx files and "explodes" them into a raw
Blender is the most versatile tool for this task. Since Blender does not support VVD natively, you will need a specific script based on the game the VVD came from. vvd to obj top
Once imported, simply go to File > Export > Wavefront (.obj). Crowbar is the gold standard for de-compiling Source