One Block

Installation

1. Install your loader for Minecraft 26.1.2 (Fabric / Forge / NeoForge).
2. Put the matching OneBlock *.*.* jar in your mods folder.
3. Create a world using level-type=oneblock:oneblock.
4. <OPTIONAL> Enable or disable built-in datapacks to toggle: starting island, multiplayer mode, void nether, void end.

Datapack usage by loader (client + server)

All loaders use the same world preset:

• level-type=oneblock:oneblock

Built-in pack meanings

• ...multiplayer = one island slot per player
• ...void_nether = removes Nether terrain
• ...void_end = removes End terrain
• ...no_island = disables initial 3x3 starter island

Fabric (and Quilt)

Singleplayer / client-hosted world

• In Create World → Data Packs, enable:
  • oneblock:oneblock_multiplayer (optional)
  • oneblock:oneblock_void_nether (optional)
  • oneblock:oneblock_void_end (optional)
  • oneblock:oneblock_no_island (optional)

Dedicated server (server.properties)

• Set:
  • level-type=oneblock:oneblock
  • initial-enabled-packs=vanilla,oneblock\:oneblock_multiplayer,oneblock\:oneblock_void_nether,oneblock\:oneblock_void_end,oneblock\:oneblock_no_island

Forge

Singleplayer / client-hosted world

• In Create World → Data Packs, enable:
  • oneblock:oneblock_multiplayer (optional)
  • oneblock:oneblock_void_nether (optional)
  • oneblock:oneblock_void_end (optional)
  • oneblock:oneblock_no_island (optional)

Dedicated server (server.properties)

• Set:
  • level-type=oneblock:oneblock
  • initial-enabled-packs=vanilla,oneblock\:oneblock_multiplayer,oneblock\:oneblock_void_nether,oneblock\:oneblock_void_end,oneblock\:oneblock_no_island

NeoForge

Singleplayer / client-hosted world

• In Create World → Data Packs, enable these built-ins:
  • mod/oneblock:resourcepacks/oneblock_multiplayer (optional)
  • mod/oneblock:resourcepacks/oneblock_void_nether (optional)
  • mod/oneblock:resourcepacks/oneblock_void_end (optional)
  • mod/oneblock:resourcepacks/oneblock_no_island (optional)

Dedicated server (server.properties)

• Set:
  • level-type=oneblock:oneblock
  • initial-enabled-packs=vanilla,mod/oneblock\:resourcepacks/oneblock_multiplayer,mod/oneblock\:resourcepacks/oneblock_void_nether,mod/oneblock\:resourcepacks/oneblock_void_end,mod/oneblock\:resourcepacks/oneblock_no_island

Multiplayer spacing

• Set oneblock.multiplayerIslandSpacing=<blocks> before first world creation.
• If spacing was wrong once, delete the world and recreate it after updating this value.

Tip

If island spacing is wrong, delete the world and recreate it after updating spacing.