Very rough placeholders are in for the top and bottom spires. I also changed the render mode to Isometric, since it shows the top and bottom towers better, and is closer to Escher's original drafting method. Some boats are now floating around in the water also. Really beginning to look like the original! I'm hoping that the roghed in cubes will save me a lot of grief when I'm doing the actual geometry. They are much easier to get in place when you aren't actually doing flat faces and strange shaped seams.