# Underground River (Cave)

## Scene Characterisation

| Property | Value |
|----------|-------|
| Domain | TERRAIN |
| Description | Bioluminescent underground river in a cave system. Glowworms, still water, darkness.... |

## Key Tests
Bioluminescent emissives, cave darkness, still water reflections, point light from organisms

## Brain Config
```bash
python -m brain \
    --reference benchmark/references/terrain/underground-river/pexels-2739013-cave-water.jpg \
    --domain TERRAIN \
    --llm claude --tier opus \
    --max-iterations 20
```

## Licensing
- **Category**: stock-free
- **License**: Pexels License (free for all purposes, no attribution required)
- **Source**: https://www.pexels.com/photo/2739013/
- **Photo ID**: 2739013
- **Attribution Required**: No