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procedural-film

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Procedural film — turn a subject into a short animated film drawn and scored entirely in JavaScript, in one of three modes: drawn (every pixel computed, zero assets), photo-doodle (real photographs with animated doodles drawn over them) or retro (pixel art on an NES palette with a chip score). Use when the user asks for a procedural film, a short hand-drawn animated film about a subject, a film that doodles on photos, or a retro pixel-art film. It also makes a retro platformer game: use it when the user asks for a retro platformer game, an NES-style game or a pixel-art game to play in the browser.

skills/procedural-film/SKILL.md

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Sep 25, 2026
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# Procedural film

Turn a topic into a **film**: roughly 30 seconds at 24 fps, every event on a **beat grid** (bpm → beats → frames), every stroke and every audio sample computed in plain browser JavaScript. The deliverable is `dist/<slug>.html` (a self-contained player) plus `exports/<slug>.mp4` and its phone and preview transcodes.

The skill also makes a retro platformer game that plays in the browser. That track is under "Retro game" at the end of this file.

## Modes — pick one before step 1

| | **drawn** (default) | **photo-doodle** | **retro** |
|---|---|---|---|
| What is on screen | every pixel computed: hand-inked **paper plate** shots cut against navy **blueprint plate** shots | a background-removed **photograph** per shot, standing on tinted paper, with animated doodles drawn over and around it | pixel art on the NES palette, shown sharp or on an optional old TV |
| Frame | vertical 1080×1920 | square 1080×1080 | 1920×1080 at 60 fps, drawn at 320×180 |
| Subject | explaining something real: a life cycle, a process, how a thing works | a story staged on ordinary objects, where each photo becomes a set (a clock becomes a bed, a pine cone becomes a mountain) | a story told as a side-scrolling pixel scene |
| Assets | none at all | photographs you source, licence and cut out yourself | none at all |
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