>>309350361
The vrchat client has to download the asset bundle for all avatars in order to display them, private or public. You can go fish around the vrchat cache directory for the files for any avatar (or world) and extract stuff with utinyripper or assetstudio. I'm sure some skiddies have made a tool to make it easier to find specific avatars in there. Ninjaripper just extracts meshes and textures directly from your gpu while the game is running, so it'll work too with whatever avatars are currently listed, but it'll be harder to put back together. 

Shaders are hard to rip in general because they're compiled to DXBC in the assetbundle , and despite searching around I couldn't find a decompiler back into HLSL. If anybody has leads on DXBC decompilers, I've been wanting to rip the koikatsu shaders for a long time.