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Green spill appearing on Precomped alpha matte
[CS3/Keylight] I pulled a perfect key on 4:2:2 footage — precomped an edge/core key and used this edgecore.precomp as an alpha track matte to the source to apply spill suppress later. This comp (called “Keyed.precomp”) has 2 layers in it, the original footage and edgecore.precomp alpha matte layer, looks perfect. But when this Keyed.precomp is taken into the Master comp for Compositing, it suddenly has green spill on the edges. Tried to unmultiply, set matte, adjust hue and add more spill suppress with no luck.
This is a bit confusing, if the Keyed.precomp looks perfect, it should be able to drop into another Master comp and look the same.
Any suggestions??
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1 Reply
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So today I did realize that the spill does exist ever-so-slightly in the Keyed comp, but it definitely is amplified when nested again into a master comp. For some reason, the alpha track matte picks up more of the edges than I would like, probably because it is not using keylights spill suppress and only looking at the alpha channel. Still don’t know why it gets increasingly bad with each nested comp, I just added spill suppression twice and tweaked the edges as a temp fix. Any more info on this would be appreciated!
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