M. C. Escher loved playing around with the mathematical properties of isometric perspective and so do I. This is based on the same grid system that Escher used for some of his most famous pieces. Every inch of the page is utilized by an image. My piece is much more modernized in the building design. I've added details to show that there is really no right side up. It has the contrast of night and day. This might help you see the different perspectives.