Live-Coding Inigo Quilez's 'Happy Jumping' Raymarched Shader

HN commenters point to it as a patient, full-length walkthrough of how a raymarched shader is built from scratch.

Inigo Quilez live-codes the "Happy Jumping" animated scene in a Shadertoy GLSL shader over about six hours. He builds the raymarched character step by step, explaining the math and procedural techniques, with checkpoints linked for each stage.