No, the rocks are not what bothers me. What does bother me is that you took the screenshot ffrom the frog perspective, meaning that you placed your camera low on the ground and then looked upwards. Theoretically there is nothing wrong with that, however, in this perticular picture, it is messing with your trees. The models of the trees are clearly meant to be looked at from above, while the look very, very ugly when looked at from the ground. you can see more of the trunk than you can see leaves. So I recommend that you should use a different tree model, one that looks still good when you look at it from below.