WIP #3

Just a quick post today.  I just got back today from class in which I finished the monochromatic underpainting for the painting in the last post.  (I missed last week due to coming home from work with a raging headache.) 

Several people have commented that I should leave it monocrhomatic.  It is tempting but I'm so sure it will look even better in color that I spent the last few minutes I had in class and painted in the sky and some of the dark recesses in the trees.  So what do you think, does it stand alone as a monochromatic painting?