I think it needs a motorcyle rider headed down the road. I don't know why, it was just the first thing I thought of. Definitely use some flattened mountains on the ground under the trees to make it lumpier. They can be piles of leaves or something. Also, can you vary the size/height of the trees a bit? They look pretty regular. Nice haze effect. It looks just like autumn haze on a fine morning. Lin.