LOL ! 
Thanks ,DandelO! 
With my last setup it was easy to get color on the hard cloud object.
And easier as i thought . But as i said in the "Edit" . The colors looked off. 
I will look after to TheBlackHole's file later. 
My brain is melting now! Didn't get much sleep these days! 
I am not sure how your setup will look like.
But it should work. Thanks 

I will make another image with (hopefully) new settings. 
Today i had an idea how to use it . 
I hope it will be as good as in my imagination.
Good night everybody!