I built EthosLM to turn a description of a place into something you can walk around in Minecraft.

The demo starts with “Build me Ba Sing Se.” It produces a city with districts, roads, walls and furnished interiors. Here's the one-minute video: https://www.youtube.com/watch?v=lgixrYLWfhc

It works by separating planning from construction. The model chooses the layout and style. A deterministic library generates the buildings, places the blocks and checks the result.

Buildings use reusable procedural generators rather than completed schematics. The same system can build a wide variety of things from villages to castles in any terrain.