• Adobe After Effects

  How to key with a provided matte?

  Posted by Lillian Young on January 4, 2010 at 9:32 pm

  A production house that was supposed to key out an actor instead provided the actor over grey. They also provided a separate matte layer (video), which looks like a perfect key.

  My problem:

  How do I apply that matte to the video so that it keys out the actor?

  I tried keying out the gray, and did a pretty good job, but there’s artifacts like underneath the arm cracks that I have no clue how to remedy despite extensive online research. So I figure that matte video they provided must have purpose. If I can apply that and call it a day, it’d be great.

  Thanks!

  Lillian Young replied 16 years, 4 months ago 59,992 Members · 1 Reply
• 1 Reply

• 

  Lillian Young

  January 4, 2010 at 11:51 pm

  Hey Dave 🙂

  I figured out that I’d need to use a a track matte (not my area of expertise), but I was fiddling with the alpha matte.

  Your suggestion resolved it. Thanks a million!!

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