Type

Specify on what variable the decay is evaluated. Available options are:

ValueDescription
Distance from lightDecay curve sections define radial regions from the light source.
Distance from light planeDecay curve sections define regions perpendicular to the light source's emitting plane.

Angle from axis

Decay curve sections define angle ranges from the light's axis. A given curve section will define a wider light region when placed toward the right end of the decay curve.
Distance from axisDecay curve sections define distances from the light's axis.

Range

This pair of parameters define the range of distances (or angles when Type is set to 'Angle from Axis') over which the decay curve is applied. 

Curve

Defines the decay values over the range specified by Range.

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