Alpha channels: premultiplied vs straight

Alpha channels are grayscale channels in addition to the color channels of a file. They define transparency and often delineate objects or selections as a matte or stencil. Alpha channels can come pre-matted (“shaped”) or as straight, with transparency anti-aliased only when composited. After Effects Help explains Alpha channel interpretation: premultiplied or straight. With straight … Continue reading Alpha channels: premultiplied vs straight […]

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