Eases (Slow Ins and Outs)

Slow In and Out means adding more frames to the beginnings and endings of actions, with the ease in usually taking up slightly more time than the ease out.

Eases are important within an animation as in real life objects and humans need time to both to pick up momentum before they can reach full speed and decrease speed before coming to a complete stop.

This principle is very closely linked to timing, as the timing must be spread between the ease in and out and the main action in the middle in order to make the action doesn’t seem robotic or unnatural.

In this GIF from Snow White, the dwarfs start off slow gain speed on the way down and then become slow again on the way back up, giving an authentic feel to the weight and use of the tools.


Disney – Snow White (1937)


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