May
14
Extract Custom ID Pass
Posted in: NUKE from The FoundryHi there,
I have a Object ID Pass with random colors from Max rendered wirth Vray. I want to "key" them in nuke and put them in an seperate alpha channel!
I’ve found this tutorial http://www.sigillarium.com/blog/lang/en/379/ for shake (on the bottom of the page) where he uses this expression to extract a color to the alpha channel:
floor(r*256)==64&&floor(g*256)==0&&floor(b*256)==1 28?1:0
Now what can I do to get something similar in nuke?
Hope someone can help me!
thanks
lee
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