Why did you change the top of the red gate to the same texture as your rocks? Has it been overlayed with rock on the top of the gate? I noticed you mirrored the image for the most part, and you are trying to force it to be asymmetrical by adding detail on one side different from the other. Well, for instance, your rocks on the right have vines but they are the same rocks as on the left. It's still very obvious that it's a mirror. Also your shadows on the steps seem too bright compared to the shadows of the rest of the scene. Oh sorry, you fixed that mainly, but the far edges where the rocks/steps meet could use a little more contrast methinks.