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Artpearl, I suggest you are making more tests by just using one layer and get a good feel for the placement of the clouds.  A lot can be explored by using the examples in CloudControl.

:) :) :)
Being that  I already said that there might be gaps in my understanding, and that your products contribute to narrowing these gaps, I cant disagree with your 'rtfm' type comment(even if it does suggest I'm not advanced enough to use 2 layers at the same time)...:)

However, I doubt it is possible to argue that not being able to see what you're doing with clouds is a
desirable, or even  acceptable, way of doing CG. You wouldnt say that having a large bounding box for an object and only being able to move it by typing in numeric values, is a nice way of working. You wouldt say that having a gizmo for manipulating  objects is not needed. Clouds are not different. With practice I can learn to walk with a blind fold, but that doesnt mean i'd be happy with it or recommend it.
Maybe my requirements are somewhat different from most users- I dont want clouds just for something pretty in the background, or for something that by itself looks realistic. Coming from traditional art, I want them to be integrated in the image, compositionally and in a narrative sense. For this I need to see exactly what they look like and position them presicely in relation to other items in the scene. Not easy and quite slow to do at the moment.
In case it wasnt clear, even though I thought I said it - I think your product advances the practicality and understanding of  the use of clouds in Vue.  As Vue content goes, yours is  much more valuable and rewarding than anything else available. But the bottom line is that clouds in Vue are still not what interactive CG is supposed to be.

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/