I have noticed that 3D pictures of things taken at a distance aren't very effective.
It makes sense if you think about the fact that 3D results from the offset of two images. Things that are close to the camera show form because there is a difference in the two pictures taken eye width apart. Things that are taken superfar away just seem 2D because there isn't much difference in the 2 images.
For example if you look at a ball up close in real life or in 3D it will look round, but the moon which is a sphere just looks 2D.
I addition I have noticed that the two images that result from a picture of objects taken far away are spaced farther apart and there for more difficult for the eyes to merge back together to form one image.