I do think a slight fog would be good for the forest below. However, don't listen to Gilles and use distance fog ^_^!!! Use the Fog Doodad that you can find in the Ultimate Terraining Map (should be posted here on this forum). Just put it down in that forest in the top right hand corner a little so it looks further away. Just my suggestion.
Also, this doesn't really make sense? A road leading into a tree? Better hope you're not blind...*thwack*
Well a positive comment is that I like the atmosphere. I don't know why, but it looks more like night than a lot of other terrains. Don't listen to me, I'm crazy in how I see terrains ^_^