Be sure to ask before taking anything you didn't create first. Ame has given permission as long as in credits the right people are listed however not all creators have given this type of permission. There are some resources on devianrt that are completely free while other ask that they are mentioned or others ask that you get the go ahead from them, some artists don't want there work modded even just changing hair color. So make sure you have permission before assuming anything otherwise it could be over for copying something.
(It's a tip not accusing of anyone of anything)