Wrong Yellow

Minecraft has places it forgot to generate correctly.

Wrong Yellow is a vanilla Java datapack that adds a hidden liminal dimension inspired by the Backrooms — not as a direct copy, but as something the game itself could have generated by mistake.

No mods. No resource pack. Just vanilla Minecraft, bent into a strange yellow place behind the walls of the world.

Features

• A hidden vanilla Backrooms-inspired dimension
• Procedural jigsaw-based generation
• Survival-compatible exploration
• Overworld wall anomalies
• Dizzying transitions between worlds
• Roof escape system
• Dense yellow rooms, wells and impossible architecture
• No mods required
• No resource pack required

Current status

This is the first release candidate of Wrong Yellow.

It is playable, but still needs public testing. Please consider it a near-v1.0 build: the core experience is here, but small fixes and performance adjustments may follow quickly.

Recommended settings

• Minecraft Java 1.21.11
• Server RAM: 6–8 GB recommended
• view-distance: 8–10 recommended
• simulation-distance: 4–6 recommended

For stronger machines or recording, you can try:

• view-distance: 12
• simulation-distance: 6

Installation

Singleplayer

1. Download the .zip.

2. Create or select a Minecraft Java world.

3. Click Edit.

4. Click Open World Folder.

5. Put the .zip into the datapacks folder.

6. Start the world.

7. Run /reload if needed.

Server

1. Stop the server.

2. Open your world folder.

3. Put the .zip into:

world/datapacks/

1. Start the server.

2. Run /datapack list to check that Wrong Yellow is enabled.

Known limitations

• This is still a release candidate, not a fully tested stable release.
• World generation can still be heavy on modest machines.
• Feedback is very welcome before the stable v1.0.0 release.

Support

Wrong Yellow is meant to be playable by everyone.

If you enjoy it and want to support development — future layers, performance improvements, experimental mechanics and devlogs — you can support the project here:

• Modrinth: https://modrinth.com/datapack/wrongyellow
• Patreon: https://www.patreon.com/c/WrongYellow
• Ko-fi: https://ko-fi.com/wrongyellow
• itch.io: https://wrongyellow.itch.io/wrongyellow