Arnis

Arnis is a free, open-source desktop app built with Rust and Tauri that converts real-world geographic data into game worlds for Minecraft Java Edition (1.17+), Bedrock Edition, and Luanti (Minetest).

It fetches geospatial data from OpenStreetMap, combines it with elevation data, and generates Minecraft maps featuring terrain, buildings, roads, and more. Users can select an area on the map via the GUI, pick a target save file, and generate with one click, or specify bounding box coordinates in the CLI for batch operations.

Key Features

• Multiple generation modes: Supports geo-terrain (default, buildings plus real terrain), geo-only (OSM objects on flat ground), terrain-only (natural terrain and water only), and blueprint (road and water outlines only).
• Style overlays: Use flags to enable --winter (snow cover, frozen rivers) or --post-apocalyptic (damaged buildings, overgrown vegetation, lights off). Both can be combined with any mode.
• Single persistent world: With the --one-world flag, adjacent areas generated across multiple runs are seamlessly stitched into one persistent world, all sharing the Web Mercator coordinate system.
• Custom settings: Adjust world scale, spawn point location, and whether interior building structures are generated.

Who It's For

Ideal for players who want to recreate their hometowns, cities, or natural landscapes in Minecraft, as well as developers and educators interested in geospatial data visualization. The project supports Windows, macOS, and Linux. For mobile support or larger maps, the official browser-based MapSmith service is available as a complement.