Random 9 chunks
by w1nt3rl0v3r
Random 9 chunks turns the Overworld into nine separate chunks, each with its own generated layers, set in an endless void.
What it does
Each of the nine survival chunks generates on its own, and every chunk has a different random block for its vertical layer. The layers begin at Y=90 and continue down to the minimum world height. The lowest layer is always bedrock, and unbreakable technical blocks such as water, lava, enchanting tables and beacons are excluded from the random pool.
A new world starts on a safe platform with one oak tree and a chest holding supplies for the first steps. A player who falls into the void receives a fresh set of supplies after respawning, and can use this recovery up to five times.
The mod is built for NeoForge on Minecraft 1.21.1 and runs on client and server, so the server and every player need it. It is released under the MIT License and is not open source. Files are published for 1.21.1 only, with 1.2.1 as the latest NeoForge file. The mod also ships with translations in two languages and customizes how the Nether and End are generated.
Key features
Nine independent chunks
Nine survival chunks generate separately, each with its own layered terrain.
Random block layers
Each vertical layer uses a randomly chosen vanilla block, starting at Y=90 and ending in bedrock at the bottom.
Starting platform and chest
A safe platform with one oak tree and a chest of essential supplies gives players a start.
Recovery kits after the void
Falling into the void grants another starter kit after respawning, up to five times.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Challenge survival runs
Players who want a harder survival start can work with scattered chunks, limited materials and a void around them.
Who it’s for: Players who want a survival challenge built on randomly generated terrain, and server owners who run a custom survival setting on NeoForge 1.21.1.
How it compares
Random Chunks is a server-side only mod for Fabric, Forge and NeoForge across 1.20 – 1.21, released under the MIT License and open source. Chunk Filler is a client and server mod for NeoForge 1.21.1 under a Creative Commons Attribution Non Commercial No Derivatives 4.0 license, and it is not open source. Custom Vanilla Trees is also client and server on NeoForge 1.21.1, but it is under All rights reserved and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Random 9 chunks | NeoForge | 1.21.1 | Client and server | 2026-07-28 |
| Random Chunks | Fabric, Forge and NeoForge | 1.20 – 1.21 | Server-side only | 2024-06-28 |
| Chunk Filler | NeoForge | 1.21.1 | Client and server | 2026-07-20 |
| Custom Vanilla Trees | NeoForge | 1.21.1 | Client and server | 2026-10-08 |
Questions
Does Random 9 chunks need to be installed on the server?
Which loader and version does the mod support?
How many times can a player recover after falling into the void?
In the catalog
Random 9 chunks is one of 8,515 World generation mods on ModsFinder, and one of 4,175 World generation mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Nine Chunks is a challenging survival mod for Minecraft 1.21.1 that transforms the Overworld into nine unique chunks surrounded by an endless void. Each of the nine chunks has its own independently generated layers. Every layer from Y=90 down to the bottom of the world consists of a randomly selected vanilla block…
Official listing
- Modrinth page
- modrinth.com/mod/r9chunks
- Owner
- w1nt3rl0v3r
- Published
- 2026-07-28
- Updated on Modrinth
- 2026-07-28
- Facts verified
- 2026-10-15