Thank you Ryan. I got (am getting) a lot out of it. Using the cloud to get better lighting. Getting the fog density fractal right. Had to experiment to get to the cloud level at the right elevation. Got good understanding of what near and far distance means. It never worked right for me (in my mind), but now I know that before near = nothing, between near and far is something, and after far is everything. (I always used to thing that it was just between near and far - and had nothing but trouble with it). The Photoshop stuff was very useful also, I had no idea that the soft light could impact an image so much. You have no idea how useful what you put together is for me!!! Thanks again.
Piet