Hey,
I am trying to create a normal map which I’ll use in the Unreal Development Kit (Game Engine) later.
I am trying to create a slashed metal look. I have painted the base shape alphas in photoshop and masked them into zbrush. I have then masked the edge and attempted to ‘extrude’ / pull or scultp out from that mask without luck.
Is there another technique someone is using to get that ‘peeled metal’ look?
Cheers
a pulled back bullet hole only happens on the exit side of a bullet impact. This could be something you need for the mandatory chest high walls of the unreal environment 
I wouldn’t actually do this with alphas and stencils. I would create a small triangle piece that can be manipulated and pulled into various angles/shapes to make the look of metal that has been shot. You can create this objects directly inside of Zbrush using Shadowbox or you can create them in a tool you feel more comfortable with. Anyway…you basically end up with one object for the metal “wall” and a lot of smaller pieces that are the torn metal. If you’re not generating the torn metal pieces in real-time with actual geometry make sure you’re not pushing the metal so far that the normal maps are going to break down during extreme viewing angles.