Thanks Wabe. I believe I had seen that thread though, and as I said the method of using spheres (or other primitives) with volumetric materials is less than ideal. The results are better than the standard clouds, but still not particularly realistic, and the question of whether they react properly to light is also a big one. Besides, this hardly qualifies as "Volumetric Clouds" as listed on E-On's feature list (separate from volumetric materials I should add). So I ask again, is E-On basically using the word "volumetric" in some other sense than I understand it, or is there really a way to make volumetric clouds using the actual cloud system? - Oshyan