When prompting for close up of skin texture and pattern I get a lot of "Can't load, We encountered a safety issue with this image. Please try again".
Hopefully in the future, Firefly will be able to take context into account (I'm just thinking this might be a context error? I can be wrong.).
I'm just speculating and thinking it now trying to generate human skin that isn't attached to the human anymore or something, that I can understand violates safety protocols.