Usage tips:
Positive prompt : score_9, score_7_up.
CFG Scale: 6
Sampler: Euler A
Schedule type: Align your steps
Clip skip: 2
No negative prompt is needed, you can still use `simple background, monochrome, greyscale` though.
Adetailer is recommended.
I also use 4xNomos8kDAT upscaler.