(@mk_1: dieses Projekt ist nicht von alpha_strike..., ist dir vermutlich ja eh klar :P)

I love the refraction stuff :P
Other then that I also think that the grenade explosion looks very cheap. And the model style doesn´t fit the environment. I can´t really comment more on it as I think that you anyways now that there is still a lot to do until it is done. But so far I really like what I see.

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com