Recommended Parameters:
Sampler: Euler a, Euler, restart
Steps: 20~40
Hires upscaler: ESRGAN 4x or 4x-UltraSharp or 8x_NMKD-Superscale_150000_G
Hires upscale: 2+
Hires steps: 15+
Hires denoising strength: 0.05~0.5
clip skip 2
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