A girl passed out at a party so some of the guys undressed her and took pics and I think it's pretty funny.
How does undressing a girl and taking pictures of her naked come across as funny to you?
Because they totally goofed on her and it was hilarious.
Taking advantage of someone passed out is very wrong and illegal. You and your friends could go to jail for this. I would make the suggestion that you get some professional help around this issue.
She was okay with it. Besides only the guys took naked pictures of her. It's not like the girl took pics of herself.
It doesn't matter who took the pics or even how she felt about it afterwards.  Without a person's consent doing something to another person is never right and when a person is passed out they can never give consent.  There truly isn't a time this is okay.