Confusing, ain't it ? My guess : if the smart sampling and light smart sampling speed up the rendering, it's because the quality isn't good in some cases . If they were perfect, then how should we be able to turn them off ? Sounds logical to me ... but frankly, i've never seen any difference . Kaom - me, a texture expert ? I doubt it ... I had tried to shade a tire and couldn't even add a text in bump on the sides of the tires . But i don't give up, i'll try a few more things and if i can find a way to do it, i'll keep you updated . Maybe someone already knows how to do that ? litst