The photo above shows my 1st attempt at painting a bush with the light shining on it. The photo below is my second attempt. The same colors were used in both paintings. The paintings are a failure in one sense in that they did not turn out as I envisioned. On the other hand, I did manage to keep some whites and kept the "S" curve of the flow of the foliage. The first painting has some good contrasts and values while the second painting has a softness that in some ways I find appealing.
Below is the reference photo taken along a highway between my hometown and Joplin, MO. Traffic was stopped because of an accident so it gave me a chance to study the light and shadow patterns on the trees and bushes.