Here is my picture, i pointed all the false stuff i could see with me'eyes.
1.The grass is too bright! Ruins the atmosphere, tint it down.
2.Upper left corner is empty and kind of too bright, it should go darker in the corners, dark fog or i would suggest trying to replace the blue fog with black and give it the dark scary feeling!
3.Whats that rock doing in the middle of the road? Looks really weird.