shader-fundamentals

SKILL.md

GLSL (OpenGL Shading Language) runs on the GPU. Vertex shaders transform geometry; fragment shaders color pixels.

| Vertex Shader | Vertex | Transform positions, pass data to fragment | | Fragment Shader | Pixel | Calculate final color |

| Black screen | glPosition not set, or NaN values | | Uniform not updating | Wrong name or type mismatch | | Texture black | Texture not loaded, wrong UV | | Flickering | Z-fighting, precision issues | | Faceted look | Normals not interpolated |

GLSL shader fundamentals—vertex and fragment shaders, uniforms, varyings, attributes, coordinate systems, built-in variables, and data types. Use when writing custom shaders, understanding the graphics pipeline, or debugging shader code. The foundational skill for all shader work. Source: bbeierle12/skill-mcp-claude.

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