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Hour 21. Advanced Animation Techniques > It's the Result, Not the Technology

It's the Result, Not the Technology

When you see a magician saw his assistant in half, no one actually gets hurt. He creates an illusion, and you can almost believe the result. Similarly, in animation nothing actually moves. Watching a series of still images can make you believe you're watching something move. In addition to the persistence of vision effect described in Hour 6, “Understanding Animation,” animators can use tricks (not unlike a magician) to fool the user into believing he sees something that never happened.

To make someone believe a ball is moving across the screen, for example, really moving it across the screen may not be necessary. That is, a Motion Tween might display the ball each step along the way—and if the user could slow down the movie, he would see it actually move. However, if the user thinks the ball moved across the screen, it doesn't matter whether it really did. Even if you're trying to communicate a principle of physics, being completely accurate in your display is not necessary. It's okay to lie. There's little value in being perfectly accurate if the result doesn't look like you intended.


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