I cannot remember!
I took a portrait painting class about 15 years ago. I painted realistic portraits for many years after that. Recently my niece was asking me to critique her portrait painting and all of a sudden I remembered something my teacher had said. It was something about the color you use when you are painting a curved edge such as the side of the nose that is going into shadow. I keep thinking it is something like "turning _____." Could you possibly know what I am talking about?
"Were I called on to define, very briefly, the term Art, I should call it the reproduction of what the Senses perceive in Nature through the veil of the soul."
—Edgar Allan Poe