Open Terrain Generator is an advanced, fully customizable world generation utility. Through its various configuration files it gives the user control over almost every aspect of Minecraft's world generation, allowing you to generate anything from floating islands to cave worlds with no knowledge of Java required. OTG is just an engine, to make use of its functions you must either install a World Preset (see Installing Worlds) or make your own custom World Preset (see Configuration below or in Navigation bar at the top). OTG supports both Spigot (servers) and Forge (servers and single-player).

The main features include:

Control horizontal and vertical noise, terrain height and volatility

Create new biomes and control the size of biomes, islands and continents

Import custom trees and other objects (BO2 and BO3)

Control over mob spawning rules and climate settings per biome

Generate large custom structures with custom mobs and loot

Options for vanilla structures like mineshafts, strongholds and villages

Full control of all blocks placed during world generation: ores, plants, dungeons, ponds and many more

Customizable options for caves & canyons

Visual settings like custom foliage, water and sky colors (OTG client required)

Generating biome maps from images

Forge Multi-dimension support (create your own dimension!)