AlphaMap

The server already knows what the island looks like — AlphaMap just shows it to you. A full map, a minimap and your own waypoints, so you always know where you are and where you're heading.

This is a client-side mod for a server that runs the AlphaMap plugin. The server renders the island and sends ready map tiles, so nothing is scanned or generated on your machine. On servers without the map the mod stays completely silent — it doesn't touch your mouse, your input or your screen.

The big map

Hold the map key (G by default) to look at the island. Press right mouse button to pin the map and get a cursor.

• Right click — place a waypoint; right click on one — remove it.
• Left click a waypoint — rename it and pick a colour; drag anywhere else to pan.
• Mouse wheel — zoom. There's also a pencil to sketch straight on the map.
• Coordinate grid with named cells, structure labels, your coordinates and the ones under the cursor.

The minimap

• Circle or square, adjustable size and view range, north locked or rotating with you.
• Drag it anywhere on the screen; coordinates can sit underneath.
• Shows nearby players (never invisible ones or spectators), hostile and peaceful mobs — each toggled separately.
• Your waypoints, the island's structures and the place where you last died. Anything out of range is pinned to the rim, so you keep the direction to it.

Structures and world markers

Structure types come from the server, so a newly added one shows up on the map and in the settings on its own, and an unfamiliar one gets a fallback icon. Every type can be turned on and off separately — once for the minimap, once for the markers floating in the world.

Built to be cheap

The minimap is composed into a single texture and drawn as one quad per frame, whatever its shape, rotation or zoom. It's rebuilt only when the picture actually changed: standing still costs nothing at all. Nearby entities are collected twice a second, not every frame.

Requirements

• Fabric Loader 0.19+ and Fabric API
• Mod Menu — to open the settings
• A server running the AlphaMap plugin

Waypoints are stored locally, separately for each server.