This technique is a foundational principle in animation, imbuing characters and objects with a sense of weight, flexibility, and life. It involves exaggerating the form of an object by compressing (squashing) it or elongating (stretching) it during movement. For instance, a bouncing ball will flatten upon impact with the ground (squash) and then stretch as it rebounds into the air, conveying the illusion of force and speed.
Its importance lies in its ability to enhance realism and appeal within animated works. By adhering to this principle, animators can create more believable and engaging motion. Historically, this technique has been integral to the success of classic animation, contributing significantly to character expressiveness and the overall dynamism of animated scenes. It enhances visual storytelling and elevates the perceived quality of the animation.