Type Specify on what variable the decay is evaluated. Available options are: Angle from 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.Value Description Distance from light Decay curve sections define radial regions from the light source. Distance from light plane Decay curve sections define regions perpendicular to the light source's emitting plane. 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 axis Decay curve sections define distances from the light's axis.