How do I install Custom World Generation?

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. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does Custom World Generation work with?

The listing gives Minecraft 1.18.2, 1.21, 1.20.2, among others. This is the version stated by the author or source site, not something we verified ourselves.

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Custom World Generation

Java mod listed for Minecraft 1.18–1.21. Downloads from the MC Java Mods app on Android.

by Viola_Siemens · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader NeoForge1 build
Mod loader Forge4 builds

Minecraft version

Minecraft 1.21Newest

Minecraft 1.20–1.20.2Newest
Minecraft 1.19.4
Minecraft 1.19.3
Minecraft 1.18.2

⬇ Download for 1.21 · NeoForge ⬇ Download for 1.20–1.20.2 · Forge ⬇ Download for 1.19.4 · Forge ⬇ Download for 1.19.3 · Forge ⬇ Download for 1.18.2 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Abstract

This mod is separated from Ocean World. You can customize terrain generation, biome generation and structure generation with this mod.

How to use

Install this mod. Server side is required while client side is optional (no effect whether install in client side or not).

Edit custom_worldgen-config.json in "config" folder in your game directory at server side (for single player, this is located at ".minecraft/config"; for multiple player, this is located in "<server directory>/config").

Following the guide in custom_worldgen-config-readme.md. You can also use Ocean World Config Generator to help you do this.

Compatibility

Before 1.20, if you want to play this mod with other mods that add biomes (for example, BYG and Emerald Craft), you need to install Ocean Blender as well.

After 1.20, ocean blender is merged into this mod so you don't have to install any other mod else.

I have to say that all biome mods except BOP can work with this mod together. I tried to contact with the author of BOP, but he seems not to want to fix this compatibility issue.

Examples/Presets

Here's some presets of config file.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.18.2, 1.21, 1.20.2
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 CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as custom_worldgen-3.0.0.jar — drop this file into the mods folder
Download size: 1.7 MB
Download link checked 26 Sept 2026 — working

These come from our own check of the pack file, not from the source page.

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