Maybe I didn’t make myself clear the first time. Quite simply said eyeland, if you use an artist’s work, that artist should be given credit especially if that artist asks for it. If that artist doesn’t, then it’s fine but an effort should be made to give the credit where credit is due especially if it is not your work. Otherwise you’re simply a copyright thief..that's all there is to it.  That’s as simple as I can get…hope you understand.