Individual skill

squash-stretch-mastery

Use when implementing deformation effects, bounce animations, impact responses, or any motion requiring organic elasticity and weight expression.

skills/11-by-principle-focus/squash-stretch-mastery/SKILL.md

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animation Repository topic
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disney Repository topic
skills Repository topic
principles-of-animation Repository topic
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# Squash & Stretch Mastery

## The Foundation Principle

Squash and stretch is considered the most important of Disney's 12 principles because it solves animation's fundamental problem: making rigid objects feel alive. Developed in the 1930s at Disney, it emerged from observing how real flesh and rubber deform under force while maintaining constant volume.

## Core Theory

**Volume Preservation**: When an object squashes, it must widen. When it stretches, it must narrow. This constraint creates believability—violate it and objects appear to grow or shrink rather than deform.

**Force Visualization**: Squash and stretch makes invisible forces visible. A ball squashing on impact shows us the floor's resistance. A character stretching mid-leap reveals velocity and momentum.

## The Elasticity Spectrum