Melissa, the dark area on the left is Photoshop blending of some watercolor that didn’t look too good in the original sketch! I wanted to show the space of the room outside the door. It was darker in that area, so I put in some dark watercolor. I was using a Niji Waterbrush on a rather large area of sketchbook paper that was not really meant for watercolor. Not a good way to lay in an even wash of color! After scanning, I used Photoshop’s Median command to blend it all together and make it into a shadow that would fit logically into the composition.