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Aetherial Islands Data pack for Minecraft 1.20.1, 1.21.1

Datapack that creates a whimsical floating islands world, with mountains, rivers, and floating ocean bowls!

On a server
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Updated
Updated 04.09.2026

Aetherial Islands

This world generation datapack seeks to redefine the standards for floating island generation. The typical floating island generation tends to be large fragmented land masses. Not to mention they don't have hills, rivers, or oceans. But this one does by rethinking 3d noise.

With this datapack, you'll be able to experience soaring islands, with rivers and mountains. Flat plains and caves. Structures on rolling hills, and more.

All of the structures and biomes generate with this world type, as they should.

However, you may get issues with some structures generating in the void, but...

Aetherial Islands — screenshot 3

Also checkout

  • No Void Structures a mod that stops any weirdness with structures generating broken and cut off in the void.
  • Diabolical Islands a mod that brings the Aetherial Island generation to the Nether!
  • Angel Islands a mod that changes the normal overworld to include Aetherial Islands when in deep ocean biomes!
  • Skylands over the Sea a mod that replaces the void in Aetherial Islands with an infinite ocean.
  • Aetherial Islands: Clusters Edit an add-on that creates zones where islands will and won't generate, creating large gaps between island clusters
Aetherial Islands — screenshot 4

Compatibility: Does this work with insert mod name here?

If that mod changes the terrain, one of the mods will probably overwrite the other. If that mod adds biomes, it should be compatible, but if you have issues with bodies of water not generating, use the optional dependency, Lithostitched. This is just because of the tricky technique I had to use to make this, along with Minecraft's weirdness with surface builders. Some issues may need specific compatibility packs made, which I may make in the future.

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How to install Aetherial Islands

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the data pack for Minecraft 1.19–1.21.11 automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Download the archive

    Pick the file Aetherial_Islands_2.0.2.zip (478 KB) for your game version.

  2. New world: “Data Packs”

    When creating a world, click “Data Packs”, drag the archive into the window, then move it to “Selected”.

  3. Existing world: the datapacks folder

    Put the archive into saves/<world>/datapacks and type /reload in game.

On a server

  1. Archive goes into the server world’s datapacks

    The world/datapacks folder on the server; players do not need to install anything.

  2. Reload the data

    Type /reload in the server console or restart the server.

  3. Use the “To server” button

    On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.20.1Data pack1.20.1478 KB 2
1.21.11Data pack1.21.11478 KB—
1.21Data pack1.21478 KB—
1.19.2Data pack1.19.2468 KB—

What it needs to run

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Author: KlinbeeLicense: MIT

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