14 minute After Effects expressions tutorial, showing you how to use toComp(), fromComp() and fromCompToSurface() to make a lens flare follow a 3D light and then project a circle onto a 3D layer that also follows the light. Also, some stuff to help you get an intuitive grasp of the various After Effects spaces: layer space, world space and comp space.
Second of a series of ten tutorials showing some very cool and very useful expressions that are only a few lines long.
Find Felt Tips After Effects templates at Videohive.
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