Rihanna Vicoul at some point injects herself with a Mutagen that transforms her body into a Slime version of her previously ratty self. This comes with many different benefits and downsides, but one of those negatives is that light doesn't reflect off of her correctly.

... No... That's just the waterdrop filter screwing up on the colors layer and not providing desirable results. Oh well, at least I like the texture I put on her. You have to admit, I got close though. If I could figure out how to render similarly though, you can bet your goo blobs I'll try a proper version of this picture again.