This is a merge of two checkpoints:
1. AbyssOrangeMix2_nsfw:
https://huggingface.co/WarriorMama777/OrangeMixs/tree/main/Models/AbyssOrangeMix2
2. Robutts-any:
https://huggingface.co/SirVeggie/cutesexyrobutts/tree/main

Even though this checkpoint is far from replicating cutesexyrobutts' style, I really like how it draws body and muscles. It's best shown on NSFW images, but it can be used for SFW as well.

It's highly advised to use these tags together:
m_robutts, illustration style, art by cutesexyrobutts
The best results I got were made using these tags, but you are free to experiment with these.
Also very important: depending on the prompt, "muscular", "muscular female" and other similar tags can create overly muscular monstrosities.
You can fix that decreasing attention on these tags, for example: (muscular:0.85)

P.S. I always use this checkpoint with Anything v3.0 vae, so I'm not sure how it will work with other ones.
It also doesn't seem to work well with high resolutions, I usually use 512x512 with x2 highres fix