Shadertoy
shadertoy.com
The GLSL fragment shader archive
ShadersFreeGLSLWebGL
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The WebGL renderer everyone builds on
Preview Three.js inline
Loads the real site in a frame. Some sites block embedding — if it comes up blank, use Open instead.
Scenes, cameras, materials and post-processing. Verbose on its own, but every 3D-on-the-web abstraction eventually sits on top of it.
shadertoy.com
The GLSL fragment shader archive
r3f.docs.pmnd.rs
Three.js as React components
by Poimandres@pmndrs
drei.docs.pmnd.rs
The R3F standard library
by Poimandres@pmndrs