Simplex-noise terrain mesh in three.js with sliders for LOD, size, roughness, amplitude and snow line, a wireframe toggle, and live vertex, elevation and snow stats.
Visual Before you run it: needs WebGL.
For games or crowded controls, open the demo in a new tab for the most room.
Playing a game or need more room? Open demo in a new tab
JavaScript runs this experiment. Open demo in a new tab