(grins at you all!) Eelie, a procedural material is a fractal math driven one, the other type would be a bitmap material, taken from an image. That's all procedural means. Drac, unacceptable! Make a sky, for once! It will be good for you. You can't be looking at grey FOREVER! (grins) Here are the mats I used on this cloud setup... Alas, Bryce 4's light editor doesn't show the numbers the way Bryce 5's Light Lab does...