Creating shiny windows
Start with a rectangle…
..add a duplicate below for the window frame.
Use the gradient tool to create a linear fill. In this case, a blue gradient reflects the sky.
Add another rectangle with a gradient alpha fill form 50% to 0%.
Create a few more copies and adjust their width.
Select all the light effect rectangles and use the skew tool (double click on the objects).
Duplicate the window rectangle to create a clip object…
… select all the light effect rectangles, then the copy of the window rectangle and do a Objects /Clip / Set.
A rectangle changed to path with a modified bottom line and a gradient fill adds some shine.
Create minor variations of the light effects and the final shine object. As a result, the rows of windows look less repetitive.
Finally, play around with colours and added decoration to create the look you are after…
… add grunge and a greenish glow [you can find the crack creation tutorial here] …
… or a sunset feel…
… or something more elaborate.