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The Last Green Pixel

A tiny rooftop robot plants one green pixel and a tree rises; the abandoned pixel-art city at dusk starts growing again. Retro 16-bit style.

Background, V1 Effects3D183 lines of codev1.0.0

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The Last Green Pixel preview
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Live, running the real source at reduced resolution.

Combine several clips and hand them over together from your sequence.

A finished film

It plays exactly as rendered and has nothing to adjust. The preview runs the same code your AI receives.

View code Sample video (1.4 MB)
Info

What it is

A pixel-art rooftop at dusk: a purple-pink sky, a crescent moon, a skyline of lit windows and a tiny robot who walks to a patch of ground and plants a single green pixel. A tree grows beside it, then more of them, until green fills the skyline and the sky brightens towards morning. The picture is a 180 by 225 pixel grid drawn directly in the shader, with ordered dithering, a layered skyline, brickwork and fireflies; there are no image files. The film has no settings.

Reuse it in your own idea

  • Climate or hope message: the bare city to the green one is a one-shot story told without words.
  • Game channel intro: a nostalgic 16-bit look that stays crisp at any size.
  • Pixel-art backdrop: hold the finished green skyline for a title.

Which part is reusable

src/pixel-seed.js is the ingredient your AI reuses. demo.js is only the example scene around it, and uses the demo harness only for the demo.

Good to know

  • The film is finished: it has no settings. To change colours or timing, edit the shader.
  • It is composed for a 4:5 portrait frame.
  • The end does not return to the start, so repeating it is a hard cut.

Technical details

Technical details
Implementation
Three.js 0.185.1 (WebGL) · ES module src/pixel-seed.js
Exports
  • createPixelSeed() => { scene, camera, setSize(width, height), update(time), dispose() }
Dependencies (exact)
  • three@0.185.1 (source) — Renderer and a full-screen shader material.
  • apw-runtime@1.0.0 (demo) — Demo harness.
How it fits a scene

Coordinates: Composed for a 4:5 portrait frame and measured by the frame height: in a wider frame the picture stays centred at full height and its background fills the sides; in a narrower one, such as 9:16, the sides are cropped.

Lighting: Painted: a dusk sky that brightens towards morning, lit windows and fireflies; there is no real lighting.

Timing: The robot walks to the ground and plants a green pixel; a tree grows, then more, while the sky lightens from night towards morning.

Output
1080×1350, 30 fps, 8 s · procedural (computed from the frame number) · not a loop — A one-shot film: it builds to a finished picture that holds to the last frame, so the end does not return to the start.
Tested
Rendered 240 frames on 2026-10-10 in Chrome 154.0.8037.97 headless on Linux 7.0.0-38-generic (x64), Node 22.14.0 (WebGL 2 via SwiftShader (software)). Same frame twice from fresh pages: identical.
Performance
One full-screen fragment shader. About 24 ms a frame at 1080 by 1350 on an integrated Intel GPU (Iris Xe), and about 4 s a frame with software WebGL. Plays at 30 frames a second at full size on an integrated GPU.
Export a video yourself
Download the source, then in the folder: npm install npm run render -- pixel-seed/1.0.0 --out my-video.mp4Needs Node 18+, ffmpeg and Chrome/Chromium. Add --params my-settings.json (from Copy settings) for your own settings.
Version
1.0.0 · sha256:71bbb576276a5bf9…
Files
License
MIT. Copyright (c) 2026 AI Pixel Wizard. Released under the MIT License. See LICENSE in this folder. License details
Provenance
From the owner's collection Twenty Impossible Worlds: the original GLSL ES 3.00 shader of the film “The Last Green Pixel”, created with ChatGPT / Codex and used as published, wrapped for AI Pixel Wizard as a three.js full-screen shader in October 2026. The collection's synthesised soundtrack is not part of this ingredient.
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