MapPreset

The MapPreset is the core data asset of the OCG plugin. By editing a MapPreset, you can define properties related to level generation, such as biome-specific vegetation, terrain appearance, and river generation.

• To create a new MapPreset, right-click in the Content Drawer and select OCG > Map Preset. Newly created presets pick up the default landscape material and PCG graph configured in Additional Settings.

Editing MapPreset

Changed in 2.0.0. Generation is now driven entirely from the OCG Window. Open it from the OCG button on the level editor toolbar, or from Window → OCG Tools → OCG. The separate MapPreset editor window and the LevelGenerator actor that 1.x placed in the level are gone — double-clicking a MapPreset now opens the standard Details panel.

Pick the asset you want to work on in the Preset field at the top, then edit its properties in the panel below. The sidebar on the left filters the panel by category.

Toolbar

Button	Description
Generate All	Runs the full pipeline in the current level: DataGeneration → LandscapeGen → Population → Hydrology.
Regen River	Re-runs only the hydrology step, reusing the cached heightmap. Requires Generate River (Experimental) to be enabled on the preset. Landscape weight edits made where the previous river ran are lost.
Force PCG	Forces PCG graph re-generation on every OCGLandscapeVolume in the current world.

Inline Fields

Field	Description
Preset	The MapPreset asset to edit and generate from.
Seed	The generation seed. It drives the heightmap, temperature and erosion passes, so changing it reshapes the terrain. The button beside it assigns a random value.
River Seed	The seed for river path generation. The button beside it assigns a random value.
Island	Generate the map as an island, surrounded by ocean.
Water	Include an ocean water body.

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Table of contents

• PCG Properties
• World Settings Properties
• River Settings Properties
• Ocean Settings Properties
• OCG Properties