Fractal Brownian Motion (fBm) from layered Perlin noise generates infinite heightmaps with biome colours, realistic hillshading and optional hydraulic erosion. Pan, zoom and explore endless landscapes.
Multiple octaves of value noise are summed with decreasing amplitude and increasing frequency. The result is a natural-looking heightmap with large features and fine detail.
Pan across the terrain. Adjust octave count, persistence and lacunarity. Enable hydraulic erosion to carve realistic river valleys. Export as PNG.
Perlin noise was invented by Ken Perlin in 1983 for the film Tron. It won an Academy Award for Technical Achievement. Every video game with procedural terrain — from Minecraft to No Man's Sky — uses it.