Patty, I am told by Maura that I misused chiaoscura in that it is a term used to describe a technique in painting and other forms of art. It's compositional element, used by artists to exaggerate the difference between light and dark - or something like that. It is an art term that I hate to tell you I misused. I am not sure it has a name, but I like to see trees, especially bare trees against a fading sky. It makes me feel good inside. You probably knew what chiaoscura was and were polite enough not to point it out. Thank you, Phillip