Vanilla One Block
by BPR02
Vanilla One Block turns a world into a single grass block floating in the sky, so players survive on that one block from the start.
What it does
Vanilla One Block is a world generation mod that sets up a skyblock challenge: a player starts on a lone grass block and has to expand from there. The mod changes how structures generate. Ancient Cities keep their bounding boxes and sculk shriekers able to spawn wardens, although the shrieker positions do not line up with a normal world. Ocean Monuments keep their bounding box without elder guardians, Pillager Outposts keep their bounding box with the allays that normally generate, and Witch Huts keep their bounding box, so witch farms can still be built.
Mansions generate the allays a normal world would produce, Nether Fortresses keep their bounding box, End Cities generate the shulkers and ships they normally would, and Trial Chambers keep their bounding box. The mod requires Server to run and Client optional, so only the server needs it. Optional dependencies are Disable Custom Worlds Advice and Sky Void Additions. Files are published for Fabric, Forge, NeoForge and Quilt across 24 release versions, 1.19.4 – 26.2, and the code is under the MIT License, so it is open source.
Key features
Single grass block start
The world begins with one grass block in the sky, which is the whole starting area for the challenge.
Bounding boxes kept
Most structures still generate in their usual bounding boxes, so their positions remain recognizable in the sky world.
Adjusted mob spawns
Some structures drop certain mobs, such as elder guardians in Ocean Monuments, while others keep the mobs a normal world would produce.
Trial Chambers included
Trial Chambers generate with the same bounding box as in a standard world.
Compatibility
Latest build for each game version and loader.
26.x4 of 4 versions with builds
1.21.x12 of 12 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.
Requirements
Dependencies declared by the latest file for each loader.
Optional 2
How it compares
Skyblock Infinite is a server-side option under the Apache License 2.0 that is not open source, published for 1.20 – 26.3. Endless City Primary is server-side too, under All rights reserved, not open source, and covers 1.20 – 1.21.5. Better Cave Worlds is open source under the MIT License, with files for 1.19 – 1.21.10 and the same server-required environment.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Vanilla One Block | Fabric, Forge, NeoForge and Quilt | 1.19.4 – 26.2 | Server required, client optional | 2026-09-13 |
| Skyblock Infinite | Fabric, Forge, NeoForge and Quilt | 1.20 – 26.3 | Server required, client optional | 2026-10-03 |
| Endless City Primary | Fabric, Forge, NeoForge and Quilt | 1.20 – 1.21.5 | Server required, client optional | 2025-08-24 |
| Better Cave Worlds | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.10 | Server required, client optional | 2025-10-17 |
Questions
Does Vanilla One Block need to be installed on the client?
Which game versions does Vanilla One Block support?
Do the optional dependencies change the challenge?
In the catalog
Vanilla One Block is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.
More from BPR02
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What the author says
The worldgen data pack infinitely generates a void world with properties akin to the original SkyBlock. This means all structures (that matter) will generate with their bounding boxes, but no blocks. These structures will generate at the same location as if the world with the same seed was generated with normal…
Official listing
- Modrinth page
- modrinth.com/mod/vanilla-one-block
- Owner
- BPR02
- Published
- 2023-10-20
- Updated on Modrinth
- 2026-09-13
- Facts verified
- 2026-10-15