Underground Dimension
Introduces a new underground dimension that players can explore.
About this Mod
This datapack adds expansive underground dimension, where the surface is replaced entirely by a network of interconnected caves. This unique environment offers a fresh and challenging experience for players who love spelunking and exploring subterranean landscapes.
Use /execute in honbar:underground run tp ~ ~ ~ to teleport to the dimension.
In conclusion this datapack is perfect for players looking to add a new layer of depth and excitement to their Minecraft adventures. Whether you’re a seasoned explorer or a newcomer to the game, the cave-only dimension offers endless opportunities for discovery and adventure.
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Available Versions
How to Install Underground 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 (1.21.5).
Install Mod
Open the mod browser in the dashboard and search for "Underground Dimension". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.5, 1.21.1, 1.21
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Underground 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 (1.21.5). You can switch loaders with one click in the panel.
Is Underground Dimension compatible with datapack and fabric and forge and neoforge and quilt?
Underground Dimension officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.5, 1.21.1, 1.21. 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 Underground Dimension – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Underground 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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Install Underground Dimension with just one click on your server.