Went back to sky

While working on the trees and brush in the foreground, I felt I needed to decide the values of the other part more clearly. Then some edges of forest lines need to be curved out with light greens with the right values.

So I went back to the sky again and put desired values on the clouds. Darker part is a little too much purplish, which I eventually knock down with more grayish tone but the values are getting close to the final.

Now I need to define the values on the mountains by separating sun lit part from shadow & cloud-cast shadow part.