When I look at this photo, what I see is the difference in tone in the real clouds and the painted clouds. I can account for it partly by the photo having been taken about 2hrs after the clouds were painted, and by the fact that I was wearing sunglasses. The amount of light bouncing all around me rendered painting without protection for my eyes unfeasible. It was a glorious day to be out and painting. Even my sunglasses can attest to that.