Random Block Area
by H3ristos
Random Block Area, a NeoForge mod by H3ristos, replaces blocks around each player in real time, with a configurable radius and shape.
What it does
Blocks within a set distance of a player are swapped out continuously, so the ground and walls around them keep changing while the game runs. The replacement area can be a circle, sphere, square or cube zone, and its radius can be set from 1 to 32 blocks. Blocks that are replaced move around automatically, which makes the surroundings look different from moment to moment.
The number of blocks replaced per tick is adjustable from 1 to 50, trading speed against stability. A whitelist decides which blocks may be chosen as replacements from a pool of more than 600 solid blocks, and built-in protection covers critical blocks such as bedrock and chests. A mod menu collects these options in one place.
The mod is written for NeoForge only and is published for 1.21.1 – 1.21.11, with 1.0.1 for 1.21.11 as the latest file. Client and server both need it, so players and the server must run it together. The code is all rights reserved and the mod is not open source.
Key features
Real-time block replacement
Blocks near each player are changed while the game runs, creating an environment that keeps shifting.
Adjustable radius
The replacement area can be set anywhere from 1 to 32 blocks around the player.
Shape modes
Replacement zones can take the form of a circle, sphere, square or cube.
Replacement speed and whitelist
Blocks replaced per tick range from 1 to 50, and a pool of more than 600 solid blocks can be filtered through the whitelist.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Challenge maps and survival
Map makers and survival groups can use the shifting terrain to make a world harder to rely on.
Who it’s for: Players who want an unpredictable world for challenge maps, survival modes or experimenting with terrain, and server owners who want to tune how fast blocks change.
How it compares
Random Tick Control is a NeoForge mod for 1.21.1, server-side only, under the MIT License, so it runs without any client install. Protection+ is also server-side only and MIT licensed, but targets 1.21.4. Better Protection Explosions is client and server, for 1.21.1, and is all rights reserved. Inconsistentize is open source under the MIT License, covers Fabric, Forge and NeoForge for 1.21.10 – 1.21.11, and is server-side only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Random Block Area | NeoForge | 1.21.1 – 1.21.11 | Client and server | 2026-01-08 |
| Random Tick Control | NeoForge | 1.21.1 | Server-side only | 2026-06-29 |
| Protection+ | NeoForge | 1.21.4 | Server-side only | 2025-03-11 |
| Better Protection Explosions | NeoForge | 1.21.1 | Client and server | 2026-09-04 |
| Inconsistentize | Fabric, Forge and NeoForge | 1.21.10 – 1.21.11 | Server-side only | 2026-02-14 |
Questions
Does Random Block Area need to be installed on the server?
Which loader does Random Block Area support?
Can the replacement area be limited to certain blocks?
In the catalog
Random Block Area is one of 7,555 Cursed mods on ModsFinder, and one of 2,801 Cursed mods for NeoForge. 19,862 mods support Minecraft 1.21.11.
More from H3ristos
Similar mods
What the author says
Random Block Area replaces blocks around players in real-time, creating a chaotic, ever-changing environment. Perfect for challenge maps, survival modes, or just messing around! Control everything from the mod menu: radius, chaos level, block selection, protections, and more!
Official listing
- Modrinth page
- modrinth.com/mod/random-block-area
- Owner
- H3ristos
- Published
- 2026-01-08
- Updated on Modrinth
- 2026-01-08
- Facts verified
- 2026-10-15