use of copyrighted materials means you did not used pencil and canvas to 3dmodel the things you used YOURSELF :) (combo joke). of course if you DID things all by yourself, polygon by polygon, with your pencil on the canvas, but you also sold/released as free what you did for other to use, it thus become copyrigthed material too :) advice: let those frantic integrists narrow minded cavemen of epilog where they belong: ELSEWHERE !