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Image mask in AE?

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Collin AlexanderImage mask in AE?
by on Apr 25, 2009 at 4:08:19 am

How do you create an image mask in After Effects? Basically I want to take the alpha information from one clip, invert it, and apply that to another clip. It's so easy in Motion.

Thanks.




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Collin AlexanderRe: Image mask in AE?
by on Apr 25, 2009 at 4:19:00 am

I guess I figured out one way - auto tracing the source layer, then copying and inverting the mask onto the destination layer.



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Todd KoprivaRe: Image mask in AE?
by on Apr 25, 2009 at 4:48:48 am

I think that you want to use a track matte.

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Todd Kopriva, Adobe Systems Incorporated
putting the 'T' back in 'RTFM' : After Effects Help on the Web
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Collin AlexanderRe: Image mask in AE?
by on Apr 25, 2009 at 4:58:37 am

Yes, thank you, track matte is exactly it. Invert alpha matte. Works.




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