Islands

Islands

Procedural island generator + erosion sim

written by
Unknown: an image by Unknown

Islands

Seeded island/terrain simulation with overlays and keyboard controls.

MAINTAINED webapp Updated February 12, 2026
Islands hero image

What it does

Islands is an interactive island/terrain sim. It generates a world from a seed, then lets you step the simulation forward and inspect the terrain.

How to use it

  • Open: islands.tedt.org
  • Set a seed and click Apply (or use ?seed=... in the URL)
  • Use the built-in keyboard shortcuts to step, pause, and toggle overlays

Notes

  • Tip from the app: pressing any key stops the initial auto-run. Press/click R to restart.

Details

Tech
  • JavaScript
  • HTML
  • Canvas
Tags
procedural terrain simulation canvas javascript tools

Features

  • Seeded generation (shareable via ?seed=…)
  • Keyboard-driven stepping and speed controls
  • Overlays for terrain/coastlines/rivers
  • Hover readouts for cell + elevation

Screenshots