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luminance compositing, masking

Posted by Michael Theodore on July 12, 2007 at 4:44am
Given three layers stacked A, B, C, is it possible to use the luminance of layer B to control the compositing of layers A and C? For examples, areas of greatest luminance allow layer A to come through, while areas of low luminance show layer C (with a range of possibilities in between). thanks, Michael

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  • Synthetik July 12, 2007 at 10:06am
    You could set the alpha channel of layer 3 with the contents of layer 2, then mute layer 2 and use replace composite on layer 3 with alpha view enabled.
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