For the enjoyers of chub/fat bodies out in the RL:

you ever get behind that big ol' thang..

spread them voluptuous cheeks (sometimes visible while UNSPREAD)

and you see that column of discoloration going ALL DOWN that chubby crack??

Yeah, so this model generates that lovely dark crack feature onto chub asses

Model was kind of difficult to get correct within the Illustrious framework, as danbooru doesn't have a proper tag for this lovely natural occurrence

You may need to up the strength when using with 3D characters

Slightly inconsistent

I shall update as I generate more good references