Fantastic Worlds (WorldGeneration)
Fantastic Worlds changes how terrain is generated, raising the build height to 512 and lowering the world depth to -128 in Minecraft's default world generation.
What it does
The mod replaces the vanilla world generator with its own parameters, producing rougher terrain and higher mountains that can reach past height 320. Build height moves from 320 to 512 and world depth from -64 to -128, while the stone and bedrock layers shift from -54 to -114. A built-in custom world preset lets a player create a new world with these settings from the start.
The mod is for players who want taller, more varied landscapes in new worlds. Because it changes generation itself, it applies to newly created worlds and does not reshape chunks that already exist. It runs on both the client and the server, so the server and every player need it. Files are published for Fabric and Forge, and the mod is released under the MIT License.
Key features
Taller build height
The build height rises from 320 to 512 blocks, so players can construct far above the usual limit.
Deeper world depth
The world depth moves down to -128, adding room underground for caves and structures.
Rougher terrain
Adjusted generation parameters produce more uneven ground and higher mountains, some reaching beyond height 320.
Custom world preset
A built-in preset applies these settings when a player starts a new world, with no manual edits.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x6 of 6 versions with builds
1.20.x5 of 5 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Tall builds
Players who build towers or skyscrapers get the extra vertical space the raised build height provides.
Varied exploration
Rougher ground and higher peaks give a new world more terrain to explore than the default generator does.
Who it’s for: Players who start new survival or creative worlds and want a taller, deeper map than vanilla allows. Server owners who want the expanded height and depth on a multiplayer world install it on the server and on every client.
How it compares
TerraMath is a Fabric and Forge mod released under the GNU General Public License v3.0 only and is open source, with files for 1.20 – 1.21.4. On a server it is required, while players may leave it out. NotHighEnough is Fabric only, under All rights reserved and not open source, for 1.17 – 1.21.11. Fantastic Worlds needs to be on both sides, so the server and every player run it, and it is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Fantastic Worlds (WorldGeneration) | Fabric and Forge | 1.20 – 1.21.5 | Client and server | 2025-06-07 |
| TerraMath | Fabric and Forge | 1.20 – 1.21.4 | Server required, client optional | 2025-05-13 |
| NotHighEnough | Fabric | 1.17 – 1.21.11 | Server required, client optional | 2026-01-02 |
Questions
Does Fantastic Worlds need to be installed on the server?
Does the mod change existing worlds?
Can Fantastic Worlds run on Fabric and Forge?
In the catalog
Fantastic Worlds (WorldGeneration) is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 15,307 mods support Minecraft 1.21.5.
More from RATPackStudios
Similar mods
What the author says
This mod replaces Minecraft’s default world generation. Simply create a new world and start exploring! This mod currently supports Fabric and Forge in 1.20 to 1.20.4, as well as 1.21 and beyond.
Official listing
- Modrinth page
- modrinth.com/mod/fantastic-worlds
- Owner
- RATPackStudios
- Published
- 2025-05-27
- Updated on Modrinth
- 2025-06-07
- Facts verified
- 2026-10-15