Dynamic Height

English Description

Dynamic Height is a Minecraft mod that allows you to change both the maximum and minimum world height. You can freely decide how high or low your world extends — build massive skyscrapers, floating sky cities, or deep underground complexes without limitations.

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A major update is now available, introducing experimental support for world heights up to 32,000 blocks (32k). At the moment, this feature is only available for NeoForge 1.21.1, Fabric 1.20–1.21.4, 26.1.1 (0.3.x).

Previously, the maximum and minimum world height could reach approximately 2,060 blocks, which exceeds the limits of Minecraft’s vanilla chunk system (0.2.x). You can use the Distant Horizons mod for a better rendering experience at extreme heights.

Server Usage

Important: To use custom world heights on a server, you must:

1. Create a world in singleplayer with the desired height.
2. Allow the world to fully generate.
3. Upload the generated world to the server and start it.

Changing world height directly on a server without pre-generating the world may result in errors or world corruption.

Performance

When using very large world heights, long save and load times are expected, as the game needs to process a significantly higher number of vertical chunks.

You may experience:

• Increased memory usage.
• Long world loading and saving times.

This is normal behavior when working with extreme world heights. The mod does not affect world generation and has minimal performance impact, making it suitable even for low-end PCs with reasonable height settings.

Important Notice

If you remove the mod or modify height values incorrectly, your world may fail to load until the heights are reset to vanilla values:

1. Open the data folder inside your world directory (and inside all dimension folders: overworld, nether, end).
2. Locate the height configuration file, for example: dynamic_height_minecraft_overworld.dat (or .json if your version is 0.3.5 or higher; in this case, you don't need an NBT editor, any standard text editor will do).
3. Reset the height values using an NBT editor or generate a new world with vanilla heights and copy the corresponding .dat file.

After the world has been generated, this file can be freely edited with any NBT editor to change world heights without recreating the world.

Incompatible Mods:

• Lithium
• Axiom (works only for 1.21.1 (from 0.3.75 and higher).

If you encounter any bugs or issues, please report them on our Discord server. Follow updates to stay informed about new features and improvements!