I found a cool little tutorial the other day and can't for the life of me find it now.. :D It was something to make your textures pop, by making copies of your layer, and moving them 1 pixel, up down left and right, and etc.. can't remember what else (possibly inverting image)... Any ideas?
I think this was on Shotgun's website. hmm I cant search his name to pull up his site, case name search on PC is broken I guess. Found it: http://skingun.planetquake.gamespy.com/tutorials.htm