Generate a world

Instead of painting from scratch, use the terrain generator to build the terrain automatically. Below is the terrain generator with Terrain Details and Stamp Placement both expanded.

Main controls

Control	What it does	Raise	Lower
Sea level	Water-to-land ratio	More ocean, less land	More land; continents and islands emerge
Continents	How much land clusters	Clusters into big continents	Breaks into small islands
Roughness	Surface ruggedness and detail	Rugged, broken-up terrain	Smooth, gentle terrain
Climate	Forest-to-desert ratio	More forest	More desert
Detail	Coastline and islet detail	Complex coastlines, more islets	Simpler coastlines, fewer islets
Arctic snow	Northern snow extent	Reaches toward the equator	Shrinks toward the pole
Antarctic snow	Southern snow extent	Reaches toward the equator	Shrinks toward the pole

Other controls

Element	What it does
Overlays	Toggle the river, snow, desert, and forest overlays.
Randomize	Sets every slider to a random value.
Stamp placement	Scatters mountain, hill, tree, and dune stamps as it generates. Covered in detail below.

Stamp placement

Turn on stamp placement and stamps are scattered to match the terrain as it generates. Four bands are adjusted separately: mountains, hills, trees (forest), and dunes (desert).

Control	What it does
Categories	The dropdown next to each band name chooses which stamp categories to scatter. Several can be selected.
Density	Sets how densely stamps are scattered.
Height threshold	The height where stamps start to appear. Mountains, for example, are placed only above this value.

Placing and editing stamps by hand is covered in Stamps.

Seeds

Every generation uses a seed. Lock a seed to keep the overall shape while you tweak the other sliders, or roll a new one for a completely new world.

Presets

Save a set of settings you use often as a terrain preset to reuse it. World and Islands ship as built-in presets.