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Adobe After Effects: After Effects Spline Tricks, Part 2: Keyframing position with masks

Chapter: Compositing Tools and Techniques

Topic: Masking or Rotoscoping

There’s more to splines than simple image extraction. Sure they’re great for cutting mattes, but mask data in After Effects is based on Bezier paths that contain specific values which can be used for more than alpha channels. In this tutorial, we take a quick look at “lifting” the shape data for use in less obvious tasks, including position keyframing.

http://www.creativemac.com/2004/01_jan/tutorials/ko19spline2040119.htm

TAGS: spline, outline, separate, mask, isolate, extract, path

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