Generate a world

Instead of painting from scratch, use the terrain generator to build the terrain automatically. The tabs at the top of the panel choose how land is made. Procedural builds a world from the sliders alone; From Image/Sketch generates terrain over a continent outline you draw or import.

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.
Advanced climates	Adds six extra climates generated by latitude and moisture.
Stamp placement	Scatters mountain, hill, tree, and dune stamps as it generates.

Advanced climates

Basic generation uses five surfaces: water, grassland, forest, desert, and snow. Enabling Advanced climates adds six climates: polar desert, tundra, taiga, savanna, rainforest, and wetland. Each climate can be toggled individually, and they are generated according to latitude and moisture. A disabled climate is replaced by the basic surface that would originally have been there without advanced climates.

Advanced climates is a per-project setting. To paint the climates with the brush, enable the Advanced climates section in the left panel.

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.

The panel also shows this map’s seed, the seed the current map was generated with. Click it to apply that seed again and lock it.

Presets

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

Generate from an image or sketch

Pick From Image/Sketch in the top tabs to define the continent outline yourself. The terrain presets and the sea-level sliders are replaced by a draft box and a Draw / Edit button.

Pressing Draw / Edit opens the Draw Continents editor.

Element	What it does
Land brush	Drag to paint continents.
Water brush	Erases painted land.
Mountain brush	Paints where a mountain range runs. What you paint becomes land, shown in a darker tone.
Brush size	The thickness of the brush.
Import image	Loads an image and recognizes the continent outline automatically. Tune the result with the Recognition and Detail sliders, then apply it. You can still refine it with the brushes afterward.
Done	Saves the draft and closes the editor.

Once a draft is ready, two sliders in the generator shape its coastline. Below is the From Image/Sketch tab with a draft in place.

Control	What it does	Raise	Lower
Coast Roughness	How rough the drawn outline’s coastline becomes	More jagged coastline	Follows the outline exactly
Coast Expand	Widens or shrinks the coastline	Land expands outward	Land shrinks inward

Press Generate and mountains, climate, and stamps are built over the outline you drew. Rolling a new seed keeps the outline and changes only the interior mountains and climate.

Drawing mountain ranges

Where you paint with the mountain brush, the generated land rises above its surroundings and mountain stamps are placed on it. Painting over it again with the land brush clears the mountain mark and returns it to ordinary land.

The height rises out of the surrounding terrain, so it reads as a range rather than a flat plateau. A thin stroke still spreads naturally into foothills, so one stroke along the ridge is enough. How rugged the range is comes from what you painted, independently of the generator’s sliders.