June 27, 2014, 01:28 PM
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.
Gordon Sits down with Nick Carew to discuss The Girlfriend Experience Season 03.