Very nice scene. I like the cloud placement, they fit right in.
With this POV, it is very easy to have HUGE populations occur. A distance shader with a distribution shader should alleviate some of the populations over kill. The distribution shader would control the slope and altitudes. The distance shader will thin out the population as it gets further away. A quick render will give the dominate color of the populations.
Use the inverse of the distance shader for the distant color of a surface layer. The distribution shader can be used for constraints of the coloring. Finally, a power fractal for the nice dominate color.
Now if you would please elect me supreme leader of the chatter people...
