looks pretty good. I'm thinking that the mid ground and background rocks could use a little more atmospheric perspective. they look pretty close in value to the rocks up front. they should match the value of the hills under them a little more. the middle one is not so bad but the far one looks too dark to me. but i'm no expert.
Here is the same sketch but with some retouches in the sky and in the fore, middle and background, thanks for your tips thirteen, so what you think with this new image?
I like the addition of the really far rock in the distance. the only thing that bothers me with the new one is the mid ground and foreground rock are almost exactly the same height.