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The ambient light source is used to simulate the effect of
inter-diffuse reflection. If there wasn't inter-diffuse reflection all
areas not directly lit by a light source would be completely dark. POV-Ray
uses the ambient keyword to determine how much light coming from
the ambient light source is reflected by a surface.
By default the ambient light source, which emits its light everywhere and in
all directions, is pure white (rgb <1,1,1>). Changing its
color can be used to create interesting effects. First of all the overall
light level of the scene can be adjusted easily. Instead of changing all
ambient values in every finish only the ambient light source is modified. By
assigning different colors we can create nice effects like a moody reddish
ambient lighting. For more details about the ambient light source see
"Ambient Light".
Below is an example of a red ambient light source.
global_settings { ambient_light rgb<1, 0, 0> }
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