Ambient Light Controls
These controls determine the color and intensity of the ambient light. Ambient light is a constant amount of diffuse light in the composite.
Ambient IntensitySets the amount of ambient light in a composite.
Ambient ColorSets the color of the ambient lighting in a composite. The ambient color is white (RGB 100%, 100%, 100%) by default.
Note: Ambient light is global to the composite. In other words, if there are several source lights in the composite, the ambient light settings are the same in all the Light controls.