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Published on Jan 11, 2009
This is the first principle of animation. Squash and Stretch is important in clay-mation. It can depend on what material you want your object/puppet to seem like. When a ball hits the ground it flattens a bit and then stretches upwards a bit or elongates. This affects flesh as well as a ball, and it can be used to make things look funny or realistic, which depends on how much exaggeration you want to use. It must maintain the same mass, or it wont look right. Because your working in clay then its not so hard to keep the mass the same. Keep in mind that when Disney was making each frame with ink and paper so they would have to have done lots of laborious area calculations for every single frame. Here is a example in 20 fps, 5 fps and 2 fps.