With what you just said "The maker of the prop would have to demonstrate that there was a profit potential in releasing images of the prop that you were cutting into." If the license agreement said not for commercial use, and you use it anyway in a image that was for sale, then there is your proof of profit potential. If the creator states its not to be used commercially, then dont, there is no if, ands, or buts about it. becuase its posted freely for use non commercialy, doesnt mean the creator loses or gives up any rights for it. It means its not to be used in images, animations, etc for profit. its pretty cut and dry. Im not pointing this directly at you Duane, so please dont take it that way, I was just using your comment to stress a point. If it says no commercial use, there shouldnt be any questions about it.