The trees definitely do distort certain features though - one good example is the tree lined sidewalk next to Buckingham Palace - when viewing in a top down view and then tilting the camera, you can see how the technology assumes the content under the trees (the sidewalk) would be the same outline as the top down view of the trees that are hanging over the sidewalk. This causes an interesting warp on the rendered view. It's interesting how realistic everything looks until it reaches that issue. Still a very nice example of the technology in use.