Here’s a pencil drawing I did of the old courthouse in Saint Louis, from my hotel window. It was a cold day, and across the street there were billows of steam pumping out of some ducts.
I was excited by the atmospherics, because the steam added life and mystery to what otherwise would have been a fairly ordinary architectural study. But I had to make sure to draw the whole structure and measure everything out before I covered it up. Some parts of the drawing are erased with a kneaded eraser.