Write a useful animation prompt
Describe an observable action
Start from an observable action. “A bird crouches, releases its feet, then lands on the next branch” gives you specific poses to inspect. Add a subject, a small palette, a camera rule and an ending. If you use a template, name the downloaded scene file and the parts you want changed.
Set constraints before rendering
Separate creative direction from implementation constraints. Describe the emotion and silhouette in plain language, then specify deterministic frames, stable textures and the desired output. Ask for a character sheet and a few key frames before spending time on a full render.
Revise with frame evidence
Treat a prompt as an editable brief. A model may produce runnable code with weak drawing or contact errors. Compare the preview with your intended action, request a targeted change, and keep a copy of the previous source. Our template previews are existing examples, not a promise of what a model will generate.
Edit an existing Canvas template
Use the attached HTML/JavaScript animation as the starting point. First explain which functions control the character, palette and timing. Keep the current composition and drawing detail. Change [SUBJECT OR COLOR] and [ONE ACTION]. Keep all texture randomness seeded and each frame reproducible from time. Show a few before/after key frames and check the start/end transition before rendering the full scene. Return the editable source and describe the changes.