Just Imagine as a extreme ... you produce a render with La Femme, a doll package, a Pose package. you make a Print, on that Print you claim full ownership and sell it for a million on a auction .... I bet that at this point some will start to sue you :) as your render license in most cases is just for Personal usage and so is your render and Print, you just are not the Intellectual owner unless you created it all by your self or purchased full owner and usage rights.