Lets say you render a turntable out of ZBrush. Now you want to composite it against a different background in post. You don’t get an alpha of your ZTool, so how would that work exactly? The best I can think of is to use a key color like key 255 green as the background color in ZBrush, then key that color out in post. I’d rather get an alpha channel if I can though. Any ideas?
turntable plus gives you an alpha channel. 
Nice! Thanks, dude.
no problem