Working in this right now:
I´m changing hull bump textures, so the effect is light dependant.
Note that intensity of effect it is not final.
Problem is that developers used bump right oriented in one side of sub, and inverted in the oposite side, wich is good to save memory, but never should be done in normal mapping textures without made a different shader in code to handle that. Of course this is not the case and in the oposite side effect it is not so good. Sometimes I would like to know who was the person to make that such crapy decisions and why.
Anyway it looks more realistic than vanilla so it is coming soon.