Terrainist: open-source tool generates Minecraft worlds from one prompt for ~$0.25-0.75
pokeuser61 · reddit · 2026-09-05
- The author open-sourced Terrainist, an unfinished demo that uses LLMs to author a world in a custom JSON "language" called loam, then compiles it into a complete Minecraft world — handling weird, unhardcoded prompts fairly well.
- Architecture: a custom modelless procedural generator combined with LLMs for unique structures.
- Cost: roughly 25¢-75¢ per 512x512-block world using gemini 3.8 flash high via OpenRouter.
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