
Sky Islands Dimension
Adds a New Dimension like the overworld with a fancy sky islands generator
Screenshots






About this Mod
Basics
Adds a new Sky Islands Dimension that has overworld biomes, structures and features.
Not a 1 to 1 match with the overworld as ocean and river biomes have been replaced with other biomes since they don't work so well in a sky islands setting.
Terrablender biomes place and function in this dimension too!
Important Info
There is no built-in way to get to the dimension in survival mode! I recommend using the Datapack Portals mod to make a custom datapack portal that takes you to this dimension.
The Dimension's namespace is "skydim:overworld".
You can use the execute command to get there without Datapack Portals.
I highly recommend a datapack that extends the world height since the top of the skylands is about at default build limit! If the datapack extends the overworld height, it will also work on this dimension.
Weather works normally but the weather command can only be executed in the default overworld! Time and Weather sync with the Default overworld.
It can get very dark in the lower parts of this dimension and due to how the dimension works, lower layers won't usually have features placed on them. Bring torches and prepare to fight lots of monsters.
Usage in Modpacks
You are more than welcome to use this datapack/mod in your modpacks, just credit me if the modpack is public!
A Note for Modpack Authors: You might have to configure some of your mods to have them accept this as an overworld-like dimension.
Available Versions
How to Install Sky Islands Dimension on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Sky Islands Dimension". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.20.1
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Sky Islands Dimension server crashes on startup – what to do?
Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Sky Islands Dimension compatible with datapack and fabric and forge and quilt?
Sky Islands Dimension officially supports datapack, fabric, forge, quilt for Minecraft 1.21.11, 1.20.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Sky Islands Dimension – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Sky Islands Dimension consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Sky Islands Dimension with just one click on your server.