This is what happens to me sometimes; I think I’m done with a painting and hang it up on the wall. After looking at it, and knowing something is not quite right, I go back and fix it. I make changes (months later!), and wonder why it took me so long to figure out. But once I go back at it, I’m much. much happier. Here is the before, and the after.

After:

You can see how the middle ground now has definition, and the late afternoon light hitting the tree tops makes the painting more cohesive. Finally!