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Creating track mattes and traveling mattes


    When you want one layer to show through a hole in another layer, set up a track matte. You'll need two layers--one to act as a matte, and another to fill the hole in the matte.

    You can animate either the track matte layer or the fill layer. When you animate the track matte layer, you create a traveling matte. If you want to animate the track matte and fill layers using identical settings, consider precomposing them (see Understanding precomposing).

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