Lesson 14. Keying

When producers want an actor to hang off the edge of a cliff, blast aliens on a distant planet, or read a book at a Parisian outdoor café, they’ll frequently save time and money, and keep everyone safe, by shooting the actor in a studio and then compositing that foreground plate onto a scene, the background plate.

To make it easier to place subjects into a new background, they are shot against a flat, ...

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