I decided not to make the windows for the tower glass block. I thought it would be too difficult to stack pieces of plexiglass to make windows and too expensive to buy miniature glass blocks, so I thought I would try bending some plexiglass in a curve to fit the tower.
Then I cut a piece if 1/4 inch plexiglass the height of the window space. I tried both 1/4" and 3/32" thick. The 3/32 was much easier to bend but I thought trimming out the 1/4" would be much easier to trim once the windows are in place since the walls of the tower are also 1/4" thick. I placed the plexi on a baking sheet raised with a couple of wood blocks. I raised it because as the plexi gets soft it can get marred if it touches the baking sheet.
I trimmed the width so they would fit and painted the inside of the window cut outs silver. The top window is a bit too short, but I think I can cover that with trim. After several tries to get the curve correct I really don't want to remake it. I think I like the large windows better than the glass block idea.
I started by cutting out two tall windows in the tower piece.
I heated the plexi at 350 degrees for about 10 minutes. You know if the plexiglass is getting soft when it starts to droop in the center. Yes, I know my oven is filthy. ;-)
Then I used my husband's fishing rod case to shape the heated plexiglass. I used this because it's the same diameter as the inside of the tower walls.
I also nearly have the Shapeways contest entry finished. Thank goodness for a couple of nice days and some spray paint!