Customise World Creation

Creating a flat/superflat world

The command to create a very basic flat world: /mv create <world-name> normal --world-type flat

Customizing superflat world

You can customize the layers and biome of your superflat world using the --generator-settings flag. The value for this flag is a JSON string that defines the layers and biome. For example, to create a flat world with a layer of stone, a layer of grass, and a layer of sea lanterns, you can use the following command:

/mv create flat normal --world-type flat --generator-settings {"layers":[{"block":"stone","height":1},{"block":"grass_block","height":1},{"block":"sea_lantern","height":1}],"biome":"plains"}

Creating a void world

Void worlds are worlds that are completely empty, with no blocks or terrain (except for a single spawnpoint). There are two main methods to create a void world in Minecraft.

Method 1: Using flat world with THE_VOID biome

By using the --generator-settings flag introduced about, you can create a flat world with the the_void biome. This will create a world that is completely empty, except for 33x33 stone platform. You can use the following command to create a void world:

/mv create thevoid normal --world-type flat --generator-settings {"layers":[{"block":"air","height":1}],"biome":"the_void","features":true}

Method 2: Using void generator plugin

Firstly, install this VoiGen generator plugin: https://www.spigotmc.org/resources/fork-of-voidgen-1-21-3-supported.121721/

Creating a void world is as shown below. See https://github.com/NicoNekoDev/VoidGen/wiki/Parameters for more customization options of the void world.

/mv create <worldname> normal --generator VoidGen --world-type flat

If you are importing a world and want to continue it being void in new chunks:

/mv import <worldname> normal --generator VoidGen --world-type flat

Single biome worlds

You can create a world with a single biome using the --biome flag. For example, to create a normal world with only the desert biome, you can use the following command:

/mv import <worldname> normal --biome @single:desert

All the biomes can be found here: https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/block/Biome.html (note that some biomes may not be available in certain Minecraft versions)