Mark, I would like the master shower to be tile for maybe three feet and then top with about three feet of glass blocks. I have found that the bottom glass blocks get too much soap scum. As I have thought about it more, I don't think I want the glass blocks to be as tall as you have them in the sketch. I know you said that they lined up with the window - is it the top of the window or the bottom? I just want the shower to feel very "open."