In this view of an art museum in Palermo, I am looking from an upper level, through a staircase in the middle ground, to a courtyard beyond. To convey a sense of spatial depth on the page, I attempted to use relative values and value contrast to suggest what is near, clarifying what is in the middle ground, and again merely suggesting what is far away. In the image below, I have stripped away the color to show the equivalent gray values of the sketch.