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Old 11-14-2012, 10:54 PM   #1
Vincent Balmori
Burlingame, USA
Join Date: Jul 2010
Posts: 126
Adding Alpha

I am pretty new to Nuke. I am working with an image-sequence/footage of a CG animated character and I am compositing it over a background. The character that has no alpha so I can not apply filters like vol-ray to it. What can I do in Nuke to make the character have an alpha?
Old 11-15-2012, 05:41 AM   #2
James W
Wellington, New Zealand
Join Date: Jun 2012
Posts: 166
I guess you could grade the CG footage and get a matte, but that tends to destroy the edges and won't look the best.

I recommend you re-render the CG character with an alpha or index object pass.
"For what is a man profited if he gains the whole world but loses his own soul?"

- Jesus
Old 11-15-2012, 08:47 PM   #3
michael vorberg
digital compositor
stuttgart, Germany
Join Date: Sep 2009
Posts: 639
depends on what you cg character is rendered on, how it looks. maybe you can pull a key or use old but good roto to make a alpha matte. but rerender the cg with alpha is the best method
Old 11-15-2012, 08:47 PM   #4
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