CGTalk - what mathematics expression does AfterEffects use ???

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kalevala

01-12-2010, 09:41 PM

what mathematics expression does AfterEffects use, when it "mattes with color" ?
(interpret footage>Alpha>Premultiplied-Matted With Color)

i try to make this operation in Fusion (with custom tool) but can not repeat it just the same clear as AE does.....

thanks..

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