This is a pencil sketch in one of my sketchbooks. I have painted this doorway a few times in different sizes, from different angles, and in various color combinations. I never tire of playing around with those shadows. Right now I am trying it on textured clayboard, and I'm finding the shadows don't work real well on that. I tend to paint in layers, and because clayboard allows colors to lift (the good news and the bad news), it is hard to build up the shadows. I'll let you see what's happening when I get a little further into it.
In reference to the previous post - the last of the ziti (at least three servings!) was finished off by a starving grandson after basketball practice. I knew that ziti would come in handy. Never under estimate your need for baked ziti.