I am not sure where this one is going. I did a lot of experimenting here with the sky.
I used Dandelo's maples, Walli's grasses and dry grasses, and a couple of shrubs from the dry bush pack.
http://www.flickr.com/photos/njeneb/5397514229/sizes/o/
I'll probably move on to something else...
Well, I think the terrain looks great njeneb!
I wouldn't pass this one down but give it some more time.
Perhaps break up the green grass with some dry grass and let the rock/sand surface show through more. Maybe have only a small population of bushes in one place.
I wouldn't use a pinkish sky with red trees (clash) but, I know, it's a matter of taste. If it looks good to you go for it :)