For the first one, I chose to completely cut out all windows to 0% opacity (full brightness):
(Click image for higher resolution)
For the second one, I dimmed some of the window details to more accurately reflect whether light was shining through or not:
(Click image for higher resolution)
For the third one, I added extra details (non-transparent items) into the mix, but kept them as the darkest details:
(Click image for higher resolution)
Out of the three designs, my favorite is probably #2 or #3.















