Interesting. Reminds me of hyperrealism and 4 or 5 point perspective. Not sure if it was here or a painting site that someone mentioned Jason De Graaf. Not all his paintings are inside balls. Makes me wonder how much photographers think about perspective and what exactly can be done with it. (Also MC Esher). By natural occurrence the world we take pictures of is going to have perspective but some pictures do seem to play with it. Anything with a hallway, tunnel or city street is going to have 1-3 point, 4 and 5 are basically just wide angles like 180 degree view like a fisheye lens or this ball or so i gather from some quick searching. Just pontificating out loud trying to break through to another dimension. I think photography is worth keeping in mind vanishing points, horizon lines and perspective lines but how to use them to increase the coolness of pictures? I'll have to look into perspective and photography more and yeah probably get a clear ball sometime.