Krea 2 Detailer Workflow

## Key parameters to tune first

- **Base KSampler → denoise**: controls how much of the source image survives the I2I pass.
- **FaceDetailer → guide_size / max_size**: raise `guide_size` (e.g. 512) for sharper faces on high-res source images.
- **FaceDetailer → bbox_threshold**: lower it (e.g. 0.35) if small/angled faces aren't being detected.
- **FX chain**: Chromatic Aberration and Lens Distortion are subtle by default (`shift=3px`, `distortion=0.15`) — push them up for a more stylized look, or bypass them entirely for a clean commercial finish.