Here's my personal realism/2.5D model for Illustrious that I've been working on. It's really good for solo female and NSFW, of course.

My settings:

• Euler A (automatic)/ Restart (normal)/DPM++2M (automatic)

• Steps: 20-30

• CFG Scale 4-6 (can go up to 10 but lower values generate better skin)

In the main prompt, I use:

• masterpiece, best quality, amazing quality, very aesthetic, very detailed, realistic, 8K, NSFW

• Danbooru tags will 100% work

In the negative, I've always used:

• worst quality, old, early, low quality, lowres, signature, username, logo, bad hands, mutated hands, mammal, anthro, furry, ambiguous form, feral, semi-anthro

Additional:

• ADetailer