# Clear Blue Sky at Midday

## Scene Characterisation

| Property | Value |
|----------|-------|
| Domain | SKY |
| Description | Pure blue sky gradient with no clouds. The simplest atmospheric test.... |

## Key Tests
Rayleigh scattering, zenith-to-horizon gradient, correct blue without tinting

## Brain Config
```bash
python -m brain \
    --reference benchmark/references/sky/clear-blue-midday/pexels-281260-clear-blue-sky.jpg \
    --domain SKY \
    --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/281260/
- **Photo ID**: 281260
- **Attribution Required**: No