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“Unmult” with and without a plug-in

June 27, 2014, 01:28 PM

http://provideocoalition.com/ryoung/story/unmult-w...

Third-party unmult plug-ins for After Effects are used to create a composite with an alpha channel of a layer based on luminance or brightness. They're often used instead of composite modes like Screen that don't create an alpha channel. Alpha channels were discussed in a companion post recently, Alpha channels: premultiplied vs straight.

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