Abstract This post delves into the implementation of my procedural earth simulation, written entirely in GLSL fragment shaders. It simulates the complete history of an earth-like planet in a few minutes, with the simulation updating at 60 frames per second. A video recording of the final shader. Protoplanet This story begins four and a half billion years ago, with a lump of molten rock... The early earth was a protoplanet, red hot and heavily cratered by asteroid impacts. As my earth simulation ...