Quantum
by Unreal852
Quantum lets players create additional worlds from inside a single game, with each world given its own name, difficulty and dimension type.
What it does
Once a world is created, it loads automatically when the server starts. Its settings are kept in a data file named quantum.dat inside the world's data directory. A command can permanently delete a world together with the data files associated with it, so backups are worth making before removing anything. The mod is a Fabric mod for Minecraft 1.19.2 – 1.21.1 and runs on client and server, so both the server and every player need it. Fabric API and Fabric Language Kotlin are required and must be installed alongside it.
Quantum is in alpha and the author states that many features are still missing, including permissions and configuration options. Commands require a server operator to enable Allow Cheats in single-player. Portals between worlds must be created by the server operator. The mod is released under the MIT License and is open source, with its source code and issue tracker public. Files exist for 1.19.2, 1.21 and 1.21.1, with the latest Fabric file for 1.21.1 published on 2024-09-22 on the alpha channel.
Key features
Named worlds
Each new world is created with a name, a difficulty of peaceful, normal, hard or the other preset levels, and a dimension type.
Dimension-based portals
A portal frame of solid full blocks is activated with a water or lava item, and a sign sets the destination world.
Spawn point command
A command sets a world's spawn point to the player's current location, using the position, yaw and pitch the player faces.
Permanent world deletion
A command removes a specified world together with its data files, and a server restart is recommended after deleting a portal.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Creative and survival worlds side by side
A server operator can keep several worlds with different difficulty settings and dimension types running from the same install.
Test worlds
Players can create a separate world to try a dimension type from another mod before using it in their main save.
Who it’s for: Server operators and players who want more than one world in a Fabric install, and who accept that the mod is in alpha with missing features.
Questions
Does Quantum need Fabric API and Fabric Language Kotlin?
Does Quantum have to be installed on the server?
Which block and item work for a Quantum portal?
Is Quantum ready for public servers?
In the catalog
Quantum is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Quantum is a multi-world mod for Fabric, it allows players to create new worlds in both single player and multiplayer. Because the mod is in alpha, it lacks many features like permissions configurations, etc. All commands require to be a server operator or enable 'Allow Cheats' in single-player.
Official listing
- Modrinth page
- modrinth.com/mod/quantum
- Owner
- Unreal852
- Published
- 2022-08-15
- Updated on Modrinth
- 2024-09-22
- Facts verified
- 2026-10-15