RampLoom

Fast modular building for Minecraft Java 1.21.1 / Fabric.

Build walls, floors, ramps and roofs with a blueprint. Edit their shapes, upgrade wood to stone and metal, and watch unsupported structures collapse from the bottom up.

Multiplayer: Co-op and online multiplayer have not been play-tested. Multiplayer support is experimental.

Build with a blueprint

Craft four sticks in a 2×2 square into a Blueprint and hold it in your main hand. Choose a piece with 1–4 and left-click to place it. Hold the button to keep building while moving; the first click is immediate and the initial repeat delay is configurable.

Pieces snap to a shared 3×3 grid. Turn to place four walls around your cell, continue ramps upward or look sideways to build alongside them. Choose 3×3, 3×1 or 3×2 sizes; aim to choose the narrow strip or pair inside the cell. Grass and thin snow are cleared; solid terrain and containers are protected.

Edit, expand and upgrade

• Edit walls into windows and doorways, open floors, draw connected ramp routes and adjust roof corners.
• Expand narrow pieces in the editor for materials. 3×1 → 3×2 costs 2, 3×1 → 3×3 costs 3, and 3×2 → 3×3 costs 2 units.
• Purchased size and strip positions are remembered. Shrinking an edit does not refund materials; resetting restores the whole purchased shape for free.
• Use an interactive mod door or choose an empty doorway in the settings.
• Repair pieces and upgrade wood → stone → metal while keeping their shape.

Initial costs are 5, 2 and 3 for 3×3, 3×1 and 3×2 respectively: half the piece area, rounded up. Walls use height × width; other pieces use forward length × width. Wood consumes planks, stone cobblestone and metal iron ingots. Creative mode consumes no materials.

All materials have three mining stages. Axes mine wood faster; pickaxes mine stone and metal faster. A complete piece remains solid until the final stage.

Supports and collapse

Structures need a connected terrain foundation. Removing the last support causes dependent pieces to collapse in waves from bottom to top, with debris. Another intact foundation can hold a connected structure. Unloading a chunk is not treated as destroying its supports.

Controls and settings

Controls are rebindable. Esc → RampLoom opens settings for direction stabilization, door style and repeat delay. Mod Menu is not required. English and Russian translations follow Minecraft's language setting.

Installation

• Minecraft Java 1.21.1, Java 21.
• Fabric Loader 0.16.0+ and Fabric API for 1.21.1.
• Put the playable RampLoom JAR in mods; keep only one version installed.
• For experimental multiplayer, the same RampLoom version and Fabric API are required on every client and the server.

Sodium and Iris are optional; shaders are not required. Back up worlds before updating. Existing pieces keep their positions; old 2×2 and 2×1 pieces remain readable but cannot be newly placed. Do not downgrade a world saved with 0.6.x.

Public beta

Singleplayer has been tested. Co-op and online multiplayer have not been play-tested; multiplayer support is experimental. Large constructions and active shader packs need further testing. Exact parity with another game is not claimed.

Controls and editing guide · Changelog · Report a bug

Watch the gameplay showcase. The video and gallery were recorded in 0.5.2; the current version adds the shared grid and editor expansion described above.

Free play, server use and unmodified modpack inclusion are allowed under the RampLoom Binary Use License. Source code remains private. Development and original illustrative branding use AI assistance; the logo is artwork, not an in-game screenshot.