Aetherial Islands
by Klinbee
Aetherial Islands replaces the usual overworld terrain with floating islands, mountains, rivers and ocean bowls generated from a data pack.
What it does
The data pack changes world generation so that land forms as separate floating islands instead of large fragmented masses. Islands can carry mountains, rivers and flat plains, and some are built as bowls around open water. Caves and rolling hills are also placed on the islands, so the terrain is not only sky and stone.
The mod runs on the server, and clients may join with or without it. Files are published for Fabric, Forge, NeoForge and Quilt across 24 release versions, 1.19 – 1.21.11, and snapshot builds are published as well. Lithostitched and No Void Structures are optional dependencies that improve structure placement on the islands. The code is open source under the MIT License, and the source code and issue tracker are public.
Key features
Floating island terrain
Islands are generated with a rethought 3D noise approach, so the world has soaring land with rivers and mountains on top.
Island-based biomes
The data pack adds Aetherial Islands to the overworld's deep ocean biomes, and an add-on also brings them into the Nether.
Structure placement
Structures are placed with the world type in mind, and No Void Structures can stop structures from generating in cut-off void.
Cluster zones
The Clusters Edit add-on sets zones where islands do not generate, which creates large gaps between island clusters.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Requirements
Dependencies declared by the latest file for each loader.
Optional 2
Use cases
Sky survival worlds
Players start on a single island and must reach others across open air, which suits survival and skyblock-style play.
Exploration maps
Clusters of islands spread across a world give exploration a route of separated landmasses.
Who it’s for: Players who want a world with floating islands in place of the standard continents, and server owners who run a generated world with the data pack.
How it compares
Floating Island For Survival is open source under the BSD 2-Clause License, covers 1.20.5 – 1.21.4, and is needed on the server, with the client optional. Survival Island is server-side only, licensed under the GNU Lesser General Public License v3.0 only, and covers 1.19.2 – 1.21.1. Aetherial Islands is open source under the MIT License, covers 1.19 – 1.21.11, and only the server must run it, while clients may leave it out.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Aetherial Islands | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.11 | Server required, client optional | 2026-02-11 |
| Floating Island For Survival | Fabric, Forge, NeoForge and Quilt | 1.20.5 – 1.21.4 | Server required, client optional | 2024-12-08 |
| Survival Island | Fabric, Forge and NeoForge | 1.19.2 – 1.21.1 | Server-side only | 2025-09-10 |
Questions
Does Aetherial Islands need Lithostitched?
Does a player need the mod to join a server that runs it?
Why are there gaps between islands?
In the catalog
Aetherial Islands is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Klinbee
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What the author says
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…
Official listing
- Modrinth page
- modrinth.com/mod/aetherial-islands
- Owner
- Klinbee
- Published
- 2024-03-28
- Updated on Modrinth
- 2026-02-11
- Facts verified
- 2026-10-15