Looking carefully at those shadows, I don't think they are in the same relative position as the shadows from the nearby trees. As if the sun is at a different angle. So, they might be part of the painting on a tarp.
Man you guys are good. One thing that bothered me was that the shadows on the other side of the court were not compatible with the shadows on the near side. Different lighting.
I also looked at other areas of the island and thought that there might be a number of areas that were camouflaged but I decided that it probably was the way foliage hangs. Different than where I live.