Most cosplayers because Kaine's outfit is so skimpy cover most of the exposed parts with flesh coloured material to protect their modesty as you do with her bum, but here the slits in the breast area look nude which helps for verisimilitude!
It really works here on the breasts, on your bottom it is more noticable. It would be nice to get a model who was comfortable with nudity to pose in the costume, as long as she had the right look as you do. There is a reason for Kaine dressing like this, and there are hints in the game.
I don't mean a regular cosplayer doing nudity. But a photograper into cosplay could photograph someone who doesn't mind being naked like a nude model or burlesque dancer for a photoshoot. Or by using photoshop to make her bum cheeks visible but just in the photo and not in real life. Do you know the reason Kaine dresses like this is to spite the fact she's an hermaphrodite caused by a defect in her cloning.