Windows are really fun to paint because you can work with both interesting shadow shapes as well as reflections from other buildings. They hint at the surrounding environment without you having to actually paint it.
The fire escape on the right side was really interesting because half of it was in light and half was in shadow. You can get some really cool points of light shining through the areas of shadow, like on the ladders. Again, I am still primarily painting at 25% zoom. You can see in the detail shot that the railing on the fire escape is actually pretty loose and crooked and the perspective is a little off in some places. There is a fine line between how loose you should paint and how refined you need to go. Trying to find that balance takes a lot of practice, and one that I have not fully come to tackle. Starting an illustration is the easy part, knowing how to finish an illustration is the hard part
