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threejs-shaders · calesthio — Claude Code skill: what it does, how to install

This skill helps write Three.js shaders, change vertices, and build custom fragment effects. Use it when built-in materials are not enough.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add calesthio/OpenMontage --skill threejs-shaders -a claude-code
Open on GitHub

What threejs-shaders does

The skill guides Three.js shader work with GLSL and ShaderMaterial. It covers uniforms, varyings, and passing data between vertex and fragment shaders. You can use it to displace vertices, sample textures, and build gradient, noise-based, or Fresnel effects.

It includes examples for ShaderMaterial and RawShaderMaterial, along with updates for uniform values, textures, and matrices. ShaderMaterial provides Three.js built-in uniforms and attributes. With RawShaderMaterial, you must define the required parameters and attributes yourself.

The skill targets projects that use the three library. The source ends during the gradient section, so this description covers the techniques shown before that point.

What it helps with

  • create a custom material for Three.js
  • change vertex positions with GLSL
  • pass values from JavaScript into a shader
  • build an effect from a texture or noise
  • send normals and coordinates between shaders

Example prompts for the agent

  • Create a Three.js `ShaderMaterial` with an animated `time` uniform and vertex displacement.
  • Write vertex and fragment shaders for a Fresnel effect using camera data and normals.
  • Add texture sampling and a gradient based on `vUv` to a Three.js material.

How to install threejs-shaders

1Skills CLI (Vercel)

npx skills add calesthio/OpenMontage --skill threejs-shaders -a claude-code

2Manually: put the files in place

~/.claude/skills/threejs-shaders/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/threejs-shaders/

From the same set28

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Other versions of threejs-shaders

threejs-shaders CloudAI-X Guides the agent through writing GLSL shaders, custom materials, and TSL nodes for Three.js r186 across WebGL and WebGPU. Claude Code CX Codex Cursor +1 15,400installs

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Questions about threejs-shaders

How do I install `threejs-shaders` in Claude Code?

Run npx skills add calesthio/OpenMontage --skill threejs-shaders -a claude-code, then run npx skills add calesthio/OpenMontage --skill threejs-shaders -a claude-code again. The skill file is at ~/.claude/skills/threejs-shaders/SKILL.md.

What does `threejs-shaders` do?

It guides GLSL shader work in Three.js, including ShaderMaterial, uniforms, and varyings. The examples cover vertex displacement, texture sampling, gradients, noise, and Fresnel effects.

What is the difference between `ShaderMaterial` and `RawShaderMaterial`?

ShaderMaterial provides built-in Three.js uniforms and attributes. With RawShaderMaterial, you define everything the shader needs yourself.

See also

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