Thanks for your quick reply John. I just got home and tried you suggestions. However, still no luck, so clearly I am doing something wrong. Attached is that screenshot you asked for, which shows my view after setting up XP as per your suggestions. As you can see, these clouds still look like grayish rain clouds rather than white ones. In rendering options, cloud detail doesn't seem to affect the way Skymaxx Pro renders the clouds, (unless you have to restart XP before changes take effect, which I have not tried yet.) Time of day is midday, if that's relevant. Don't get me wrong: I've nothing against gray rain clouds either! I'd just like to figure out how to choose between white and gray clouds. Somehow, white clouds are more cheery I guess.