Have you ever been out at sea? The waves gently rocking your boat. You glance over the railing and the horizon dissolves into nothing. An empty, cold and uncaring abyss. You stare at it and it does not stare back. To the ocean you are nothing more than a flake of marine snow. Her all-consuming void hiding secrets man should never know. The only thing separating you and a bottomless void is your man-made seashell you call a boat.
What is added?
This datapack changes the worldgen for the overworld to tall jagged islands and deep crushing oceans. The world height is increased and now ranges from y = -64 to y = 352.
Why add this?
I made this datapack to fill a void I saw. there was no worldgen with steep cliff-like islands spread throughout a deep ocean. The plan is to pair this with Create Aeronautics to build custom boats and diving machines.
Other notes
- There aren't many dry caves
- Caverns are rarer than vanilla worldgen
- Due to the increased world height, there might be more lag than usual for some users
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
- Downloads as oceanographic_1.1.3.zip
- Download size: 115 KB
- Download link checked 21 Aug 2026 — working
These come from our own check of the pack file, not from the source page.