Recommended parameters:
Sampler: DPM++ 2M Karras

Steps: 20~40
Resolutions: 512x768 for Portrait
Resolutions: 768x512 for Landscape
Hires.fix: R-ESRGAN 4x+Anime6b
Negatives: ' (worst quality, low quality:1.4), (zombie, sketch, interlocked fingers, comic), '