How to Create a Custom World with Editable Generation Rules

Accessing the Rules Editor

To begin configuring a world with custom generation settings, navigate through the standard world setup:

1. From the title screen, select Create New World.

2. Locate the world type option and change it to Custom.

3. Click the Edit rules button that appears to open the configuration editor.

Customizing Generation Parameters

The editor provides category tabs to customize generation for the Overworld, Nether, and End separately:

• Terrain: Adjust surface elevation sliders and shape the landscape contours.
• Caves: Modify the size and shape of underground caverns and underwater cave systems.
• Biomes: Alter biome frequency, foliage distribution, and surface decoration.
• Structures and Ores: Tweak structure spacing intervals and ore generation rates, or specify block types to replace or remove entirely during generation.

Finalizing the World

After setting your rules across your chosen dimensions, save your configuration, exit the editor back to the main creation screen, and click create to generate and explore your custom world.