Part 3 of Saint11’s Aseprite series covers basic animation: how the timeline and frames work, straight-ahead vs pose-to-pose, and a 32×32 bouncing-ball loop built by duplicating and moving frames. It then tunes frame duration, adds squash-and-stretch (including anticipation and contact), and shows how to export a GIF, numbered PNG sequence, or sprite sheet for the web or games.
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