My OneBlock / custom map loads as normal terrain instead — why?

When a OneBlock or custom map boots into ordinary terrain, it's the same root problem as any "new world instead of my map" issue — the server isn't loading your map's folder. Custom maps often add one extra requirement: a plugin or datapack the map depends on.

The root cause

If the server generates default terrain instead of your map, it isn't loading your map's folder, so it makes a fresh normal world. That comes down to folder naming and level.dat placement — plus, for special maps, a missing dependency.

Step-by-step fix

1. Stop the server.
2. Ensure the map folder is named exactly world (or matches level-name), with level.dat at its root.
3. Install any required datapack or plugin the map needs — many skyblock/OneBlock maps rely on a specific plugin to work.
4. Re-upload the world if needed and start.

Tip: OneBlock and skyblock maps frequently need a companion plugin for the block-breaking/island mechanics. Check the map's page for its required plugin and install it from the Mods & Plugins page before loading the world.

Frequently asked questions

Why does my OneBlock just show normal land? Either the map folder isn't being loaded (name/level.dat issue), or the plugin that runs the OneBlock mechanic isn't installed. Fix both.

Which plugin does my map need? It's listed on the map's download page — install that exact plugin, then re-upload or restart so it takes effect.

I did all this and it still shows terrain — what now? Double-check level.dat is directly inside world, confirm level-name, and read the Console. Share the log via mclo.gs and open a ticket if you're stuck.