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03-11-2008, 08:31 PM   #7
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Join Date: Sep 2002
Location: Minnesota, USA
Posts: 3,709
Originally posted by mariosaidvieira
As soon as I convert it to polys, the shading turns out to be a lot less realistic and very flattened and washed out.
Hi mario! Welcome to SM

What you are trying to acheive in Post-terms is called a "Holdout" matte or as Maya calls it, a black hole.

To answer your question, shading shouldn't be of any concern to you, as all you require is the alpha information to get what you want

So, I would suggest saving your scene as another separate Maya file, then convert your object(s) to polys.
Then apply a shader to the object, and apply the Black Hole setting to give you your "Holdout-pass", or black hole matte pass.

Then, simply render-out that pass giving you the matte you require for your normal scene to look correct in post (i.e. compositing)

Does this make sense?

If not, lemme know
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
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