Dude, how many terrains per week come from you? 8?
Ok, It seems that you didn't tinted the doodas you used there. You should tint them to a color where you find an harmony. I mean, the big tree just doesn't maches with the color of the shrubs, wich doesn't maches with the leaves of the other trees, and etc.
The fog is ok IMO, it gives a "wet" look to the forest.