For best outputs and usage:

Samplers: Euler a / DPM++ 2M Karras.

Steps: 20, cfg 7 ~ 8.5, CLIP skip 2.

VAE: sdxl_vae.safetensors

Pos prompt: start your pos with "score_9, score_8_up, score_7_up, rating_explicit, realistic, photo, ultra realistic, 32k, masterpiece, highly detailed skin, high quality, rating_explicit" (or without "rating_explicit" if you don't plan to output NSFW). Sometimes the model may go a little deaf, specially if you're outputting 3 pictures. In these cases, apply weights and also play with the neg to guide the model towards your goal.

Neg prompt: "score_6, score_5, score_4, score_6_up, score_5_up, score_4_up, source_anime, source_cartoon, (skinny), (fat), (chubby), blurry, jpeg artifacts, normal quality, worst quality, low quality, missing fingers, extra digits, fewer digits, bad eye, sfw, text, logo, signature, watermark, website, username".

Checkpoint Merge.