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:
| Parameter | Description |
|---|---|
| No Decay | Light intensity remains constant with respect to distance. |
| Linear | Light intensity decreases linearly with distance. |
| Quadratic | Light intensity decreases proportionally to the square of the distance. This is the physically correct behaviour. |
| Cubic | Light intensity decreases proportionally to the cube of the distance. |