[Chris Saper]

Next, I consider the color of the light source, so that I can move temperatures (always within the correct value range) in the right direction. In this example the hair on our left is lit by direct, warm sunlight; the hair on our right (and in the cast shadow on our left) is illuminated by relatively cooler light, reflected from the sky, and uninfluenced by the color of direct sunlight. The most accurate local color is found in the transition area between light and shadow.