• Adobe After Effects

  Image mask in AE?

  Posted by Collin Alexander on April 25, 2009 at 4:08 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.

  Collin Alexander replied 17 years ago 2 Members · 3 Replies
• 3 Replies

• 

  Collin Alexander

  April 25, 2009 at 4:19 am

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

  Todd Kopriva

  April 25, 2009 at 4:48 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 Alexander

  April 25, 2009 at 4:58 am

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

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