Expanded World
by Sashiro
Players who want deeper caves and taller terrain can install Expanded World, a world generation mod that raises the build height and adds new cave systems and structures.
What it does
Expanded World extends the world height, lowering the minimum Y level to -128 and so adding depth beneath the usual limit. Cave layouts are customized for ice, snow, desert, jungle, swamp and badlands biomes. Vegetation in swamps and birch forests is denser, and fallen trees can lie within forests and taigas.
Village and outpost placement is expanded across more biomes, and new village variants appear in badlands, swamp, dark forest and jungle. A new small structure type, camps with tents and campfires, can generate as well. The mod can run as a Fabric, Forge, NeoForge or Quilt mod, or as a data pack, and the server requires it while a client may leave it out.
Expanded World is released under the CC0 1.0 Universal license and is not open source. Files exist for 1.19.4 – 1.21.4, with the latest build, 1.4.0, targeting 1.21.4 and dated 2024-12-30. A known issue reduces ore generation compared with what the author intends, and a fix is being worked on.
Key features
Taller and deeper worlds
The world height is extended, with the minimum Y lowered to -128 for deeper underground exploration.
Biome-specific cave systems
Cave networks are generated for ice, snow, desert, jungle, swamp and badlands biomes.
Expanded vegetation
Swamp and birch forest vegetation is augmented, and fallen trees appear in forests and taigas.
New villages and camps
Villages and pillager outposts are placed across more biomes, with new variants and small tent-and-campfire camps.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x5 of 5 versions with builds
1.20.x7 of 7 versions with builds
1.19.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Exploring deep caves
Players who want more underground space can explore the lowered minimum height and the new cave systems.
Who it’s for: Players who want more vertical space and varied cave systems in new or existing worlds, and server owners who want to add these features to a multiplayer world.
How it compares
Better Cave Worlds is open source under the MIT License, is server required with client optional, and covers 1.19 – 1.21.10 on Fabric, Forge, NeoForge and Quilt. Luki's Grand Capitals is also server required with client optional, on the same loaders, for 1.19 – 1.21.11, but it is not open source and is licensed as All rights reserved. Expanded World covers 1.19.4 – 1.21.4 under the CC0 1.0 Universal license.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Expanded World | Fabric, Forge, NeoForge and Quilt | 1.19.4 – 1.21.4 | Server required, client optional | 2024-12-30 |
| Better Cave Worlds | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.10 | Server required, client optional | 2025-10-17 |
| Luki's Grand Capitals | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.11 | Server required, client optional | 2026-01-13 |
Questions
Does Expanded World need to be installed on the server?
Which loaders does Expanded World support?
Why are there fewer ores than expected?
In the catalog
Expanded World is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from Sashiro
Similar mods
What the author says
Please be advised that there is currently an issue affecting ore generation across all versions, resulting in fewer ores than intended. A fix is actively being worked on and will be implemented as soon as possible. Thank you for your patience and understanding.
Official listing
- Modrinth page
- modrinth.com/mod/expanded-world
- Owner
- Sashiro
- Published
- 2024-05-01
- Updated on Modrinth
- 2024-12-30
- Facts verified
- 2026-10-15