Light Intensity and Color Controls

Color

Defines the light color.

Intensity

Species the light intensity.

Exposure

This is an additional control over the standard light intensity. Exposure is in many cases a preferred control due to its likeness to photography. Final light intensity is thus computed by:

I = intensity * pow(2, exposure)

Decay Rate

Specify the rate at which the light intensity decreases in function of the distance to the light source. The available values are:


ParameterDescription
No DecayLight intensity remains constant with respect to distance.
LinearLight intensity decreases linearly with distance.
QuadraticLight intensity decreases proportionally to the square of the distance. This is the physically correct behaviour.
CubicLight intensity decreases proportionally to the cube of the distance.