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Adobe® After Effects® 7.0 Classroom in a Book® by Adobe Creative Team

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Chapter 7. Keying

Keying

The word keying might conjure up images of a weather person on the evening news, or a shooting technique used in major motion pictures, but with After Effects, even the simplest, least-expensive project can take advantage of this technique.

Lesson overview

<feature><title></title>

In this lesson, you’ll learn how to do the following:

<objective>

Create a garbage mask.

</objective>
<objective>

Use the Color Difference Key effect to key an image.

</objective>
<objective>

Check an image’s alpha channel for errors in a key.

</objective>
<objective>

Use the Spill Suppressor effect to remove unwanted light spill.

</objective>
<objective>

Pull a ...

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