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Threejs Screen Space Ambient Occlusion

Community
scottstts
threejs-screen-space-ambient-occlusion

Implement a production GTAO path in Three.js. Use for half-resolution horizon sampling, reversed-depth reconstruction, bent-normal encoding, full-resolution bilateral reconstruction, environment-light application, contact grounding, and halo diagnosis.

Overview

Publisherscottstts
RepositoryThreejs-Awesome-Graphics-Agent-Skills
Skill namethreejs-screen-space-ambient-occlusion
Stars
894
Forks
98
Bundled files
2
LicenseMIT
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 2 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by scottstts on GitHub. Read the source before you install it.

Installation

Install the Threejs Screen Space Ambient Occlusion AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills/tree/main/skills/threejs-screen-space-ambient-occlusion
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills.git /tmp/Threejs-Awesome-Graphics-Agent-Skills
mkdir -p .claude/skills
cp -r /tmp/Threejs-Awesome-Graphics-Agent-Skills/skills/threejs-screen-space-ambient-occlusion .claude/skills/threejs-screen-space-ambient-occlusion
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Threejs Screen Space Ambient Occlusion in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Threejs Screen Space Ambient Occlusion on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Threejs Screen Space Ambient Occlusion is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Screen-Space Ambient Occlusion

AO estimates missing ambient visibility. It must modulate indirect lighting, not repaint all scene color with a dark multiply.

Workflow

  1. Verify linear depth and view-space normals.
  2. Reconstruct view position consistently.
  3. Sample horizon visibility in a controlled radius.
  4. Estimate AO and optional bent normal.
  5. Denoise with depth/normal-aware filters.
  6. Apply to indirect diffuse and environment response.

Read references/gtao-bent-normal-pipeline.md.

Failure conditions

  • direct light and emission are darkened;
  • radius is specified only in pixels;
  • foreground silhouettes cast thick screen-space halos;
  • depth discontinuities are blurred together;
  • AO remains strong at distances where its world radius is subpixel;
  • bent normals are treated as ordinary geometric normals;
  • the implementation claims temporal accumulation even though this path has none.

Routing boundary

This skill owns GTAO gathering, bent normals, denoising, and AO application. Use $threejs-image-pipeline only when its depth/normal buffers or pass order must be coordinated with other image-space systems.

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Threejs Screen Space Ambient Occlusion AI skill do?

Implement a production GTAO path in Three.js. Use for half-resolution horizon sampling, reversed-depth reconstruction, bent-normal encoding, full-resolution bilateral reconstruction, environment-light application, contact grounding, and halo diagnosis.

Why use Threejs Screen Space Ambient Occlusion on TypingMind?

Because you install it once and use it with any model. Threejs Screen Space Ambient Occlusion is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Threejs Screen Space Ambient Occlusion in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/scottstts/Threejs-Awesome-Graphics-Agent-Skills/tree/main/skills/threejs-screen-space-ambient-occlusion. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Threejs Screen Space Ambient Occlusion?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Threejs Screen Space Ambient Occlusion?

As many as you like. As long as a model supports skills, you can use Threejs Screen Space Ambient Occlusion with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Threejs Screen Space Ambient Occlusion AI skill free?

Yes. It is published on GitHub by scottstts under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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