[1.20.x] Load non procedural worlds

[Aes123]

I want to add a custom dimension to my mod that is not randomly generated. I want this world to be a void world with a huge island I have created. I don't want to use jigsaw and structure blocks for this as the island does not have procedural elements and is very large (500x500 blocks). I have taken a look at the end dimension which has a big island in the center but I haven't figured out how to do it myself.

Edited August 26, 2023 by Aes123
Title edit to match the topic

[warjort]

Use the search function. This topic has been discussed many times before in various forum.

It is also mostly a datapack question rather than a modding question: https://minecraft.fandom.com/wiki/Custom_dimension

Mods are datapacks.

 

The key part is creating your own ChunkGenerator..

In case this part hasn't been discussed before, you can look at DebugLevelSource in the vanilla codebase for a chunk generator that uses hardwired worldgen (a grid of all blocks in the game).

Edited August 26, 2023 by warjort