in halo 2, there is supposed to be hit locations, where a character will show a bullethole, laser burn, w/e where you shoot him. is this possible with shaders?

you can do it whithout...
I use a shader on a bullethole, eg:
if the wall is metal, then it will create a mdl model, very small, and with cubicenvironment on it.. or just a shiny material..heheh