Use the latent upscaler. The best results are achieved precisely with it.

Recommended Settings:

• Sampler: Euler A or DPM++ 2M Karras

• Steps: 25-60

• CFG Scale: 5-6

• CFG Scale: 2 = realistic

• Clip Skip: 1-2

• VAE: Built-in or recommended SDXL VAE for extra gloss

• Upscaler; latent

Positive Prompt Tips:

masterpiece, best quality, amazing quality, ((())), voluminous hair with shadows and depth, highly detailed, full and textured, realistic lighting

Negative Prompt:

zombie, bad fingers, bad hand, bad feet, extra digits, (lipgloss, lipstick:0.7), lowres, missing, worst quality, jpeg artifacts, low quality, unfinished, displeasing, oldest, signature, jpeg artifacts, blurry, ugly, (jpeg artifacts,:1.3), text