Chapter 26. Green/Blue Screen Keying and After Effects

As you learned in the last chapter, keying involves replacing elements of one image with those of another. Green and blue screen keying keys out the green and blue information from one image, making it transparent so other images can show through. Using green and blue screen keying techniques, you can make a person appear in different locations or environments. In the Lord of the Rings films, for example, green screen tarps were hung up around actors to enable full flexibility for incorporating computer generated background elements in hundreds of shots.

In this chapter, you will learn how to set up and light a green/blue screen shoot, as well as how to key out the recorded green/blue elements ...

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