MapGen AI
Describe your map in natural language — AI generates it for you.
Type anything like "mountain fortress with hot springs", "straight river on the left side", or "just surprise me" and watch the AI configure your map in real-time with Map Preview.
Features
- Natural Language Map Generation — Describe terrain in plain text, AI converts it to map parameters
- Live Map Preview — See changes instantly through Map Preview integration
- Elevation Shapes — Diagonal mountain ranges, central lakes, ring fortresses, canyons, slopes, and more
- River Control — Direction, position, and straight river mode
- Terrain Tuning — Rich soil density, vegetation, animals, ore, ruins, rock types, caves, geysers
- Odyssey DLC Support — 60+ tile mutators (hot springs, fjords, oasis, animal habitats, etc.)
- Preset System — Save and load your favorite map configurations
- Iterative Refinement — Keep chatting to tweak your map until it's perfect
Quick Start
1. Subscribe to this mod and Map Preview (required)
2. Open Mod Settings → MapGen AI, select your LLM provider and enter your API key
3. On the world map, select a tile — click the ✦ AI Map Gen button next to Map Preview
4. Describe your ideal map and hit Send!
Supported LLM Providers
- Google Gemini
- OpenAI
- Local LLMs
Example Prompts
- "Diagonal mountain range with a central lake"
- "Mountain fortress with hot springs"
- "Straight river on the left, marble only, no rock chunks"
- "Clean flatland with lots of rich soil"
- "Just recommend something"
Tips
- Not sure what features are available? Just ask! Type things like "what ancient ruins are there?", "what special terrain features can I add here?", or "what rock types are available?" and the AI will list the options for your current tile. Great for browsing Odyssey DLC terrain features without having to look anything up.
- Undo and Reset are your safety net — If the AI generates something you don't like, hit Undo to go back one step, or Reset to wipe everything and start fresh. No need to re-open the dialog.
Requirements
- Map Preview (required dependency)
- An API key from Gemini, OpenAI, or a local LLM server
Compatibility
- RimWorld 1.5 / 1.6
- Odyssey DLC — Supported (enables 60+ additional terrain mutators)
Also check out
If you enjoy AI-powered mods, give RimTalk a try — it lets your colonists have AI-driven conversations. The multi-provider settings UI in MapGen AI was inspired by RimTalk.
GitHub (Source Code)[github.com]
