[N64] Banjo-Tooie Model texture Issues

[Boxy]

You probably need to simplify the shader setup before exporting. Try only using the diffuse texture and it should work. You can always include a .txt explanation or a screenshot of the shader setup in the submission to tell people how to use it.

Obj doesn't support vertex colors generally. You can bake vertex colors to a texture, if needed. But dae/fbx should store the vertex colors fine. You might need to enable them after re-import to see them.