Tiny Tunnels

Whole rooms inside a single block. Place a machine, shrink yourself down, and build anything inside: a smelting line, a redstone circuit, a storage room. Tunnels on the room's walls connect the inside to the outside, so pipes, hoppers and redstone work straight through the machine.

Beta. Things may still change or break. Please report bugs on the issue tracker.

Features

Machines

• Six sizes, with rooms from 3×3×3 up to 13×13×13 inside.
• Use the Shrinker on a machine to enter its room; use it again inside to leave.
• Machines can go inside other machines' rooms.
• A room stays loaded while its machine's chunk is loaded.

Tunnels

Place a tunnel on a room's wall from the inside. It links to one side of the machine, and a letter shows up on that face outside.

• Tunnel: items, fluids and energy. A hopper, pipe or cable on the machine's face works with whatever touches the tunnel inside.
  • Pass-through (default): talks straight to the block on the other side. Storage buses and comparators see the real inventory.
  • Buffered in / Buffered out: holds a stack and pushes it one way. Use this for pipe → tunnel → pipe. Right-click the tunnel with an empty hand to switch.
• Redstone Tunnel: carries a signal in or out of the machine, full 0–15 strength. Right-click it to flip the direction.

The Tunnel Wrench

• On a tunnel: right-click moves it to the next side; sneak + right-click removes it.
• Break a machine with it: you keep the machine with its room, in creative too.
• Right-click a machine: turns it 90°; the tunnels follow.
• Sneak + right-click twice: deletes the room. Everything inside comes back to you (configurable).

Copying rooms

Hold an empty machine of the same size and sneak + right-click a machine to copy its room. In survival the copy costs the blocks and tunnels it contains; chat tells you what's missing. Chests come out empty.

Create addon

Using Create? Get Tiny Tunnels: Create for the Kinetic Tunnel: rotation and stress through the machine wall. Build a power plant inside a block.

Compatibility

• Works with pipes, cables and storage from any mod that uses NeoForge's standard item, fluid and energy handling (tested with Pipez).
• Jade shows tunnel modes and buffer contents.
• JEI / EMI show the recipes.

Config

tinytunnels-server.toml: the shrink animation, buffer sizes, whether beds explode in rooms, and whether deleting a room gives its contents back (deletingRoomDestroysContents, off by default).

Requirements

• Minecraft 1.21.1, NeoForge 21.1.200+
• Install on both client and server.