Okay, first, as the title implies, I made this shot through a window, which wasn't all that clean. That's where some of Walter's spots came from. In the "woman's" hair the spots come from stray hairs that became catchlights for the out-of-sight spotlight on her hair.
I hear what you're saying, Slobodan, but to me the rail on the ceiling, the brown plaid jacket, and the almost vanished duct in the upper right are important parts of the picture. The background is a bit disorienting, which fits in with the weirdness of the two figures in the foreground.
This one is from the old D3, by the way.