GSS

GSS is a stylesheet language that compiles CSS-like selectors, cascades, and keyframes into a single raymarching fragment shader for GPU rendering.

GSS, or GPU Style Sheets, allows developers to define 3D scenes using CSS concepts like selectors, cascades, and @keyframes. It functions by compiling these style rules into a single fragment shader, which is then raymarched on the GPU. This approach eliminates the need for meshes or libraries like Three.js for 3D rendering. The language is compatible with LLMs, which can generate the necessary style sheets directly. It is designed for applications needing to render 3D scenes via style rules rather than traditional object-oriented graphics programming. The system includes TypeScript support and provides integration options for modern web workflows.

GSS at a glance

Best for: Software engineer, Designer
Runs on: Web
Pricing: Free
Released: October 2026
Category: AI coding tool
Website: gss-lang.dev

Key features

Compiles CSS syntax into GLSL fragment shaders
Uses raymarching for GPU-based rendering
Supports CSS cascade and keyframes for 3D objects
Integrates with TypeScript via included types
Includes a Vite plugin for .gss file import
Available as an npm package
Provides a versioned browser module via CDN

Use it for

Styling large numbers of 3D objects with single selectors
Generating 3D scenes using LLM-written style sheets
Rendering raymarched scenes within web applications

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