Hi Emily. I’m a bit confused by “background pass with primary corrections”. Do you mean that is a pass where the green screen has been cleaned up/averaged out? If yes, what you do is this. Background plate, is bottom layer. Foreground plate is middle layer.
Top layer is the “background pass with primary corrections”, and key this layer, and get the best key possible. Don’t worry about blowing out the actor with color adjustments. Sometimes you may even want to precomp the key layer, create multiple instances of it, if it’s a troublesome key. This layer(or precomp) will just be a matte for your color graded layer.
When you have pulled the best key possible, take your middle layer and change it’s track matte to “alpha matte”. If the track mattes aren’t visible you can toggle them by pressing F4.
Hope that makes sense, let me know if you have any questions.
Johnny Cuevas, Editor
Thinkck.com
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