Changing the models wont happen. It'd be a whole different game if it was done. Maybe if there's a Toribash 2 (as in a second game, not v2) it could happen, but not as things stand.

As for the 3d environments... Well there are some mods that provide them but obviously that's not what you mean. For the moment there's the environments script that adds it to the game, however it'd be far better if it was part of the client itself.

It's something that's been brought up several times since the script was made, and although there's no sign of it happening I'd like to think it'll eventually make it way in.