Hi, me again !!! I think, that for helping the discuss, we must dinstinguish two problems : - steps caused by the terain editor - graininess in the render Being confronted to both of them, I solved the first one with the trick I suggested in my previous posts, making the terrain the same size as the resolution of the picture used (as far as possible, a big resolution), and for the second one, render your picture at no less quality than broadcast. Hope it can help...