recommended parameters for generating images with this model are:
Sampler: Eular a (Important! The model is specifically adapted to Eular a, other samplers may not yield as good results)
CFG scale: 7
Sampling steps: 30 steps (25~30 steps are acceptable)
Hires algorithm: ESRGAN 4x / 8x_NMKD-Faces_160000_G
Hires Upscale factor: 1.5x
Hires steps: 20 steps
Hires Denoising strength: 0.3
Credit: https://civitai.com/user/LEOSAM