Here's the finished painting. I painted in some partial cloud cover and, as per my wife's suggestion ( I always try to do what she tells me.) I darkened existing shadows and added some that weren't already there. Shadows are like punctuation; they give shape and meaning to otherwise confusing information. Still, sometimes I find myself resisting adding them, or making them dark enough. I'm not sure why I'm so hesitant, but when I overcome the hesitation I'm usually pleased with the result.