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13.2.3.2 Spread attributes

 
Spread section of the ifmSpotEmitter material
 
 
Cone Angle
Spread or angle of the cone to which the cosine distribution is restricted. The hemispherical domain for the distribution is rescaled to this cone.
 
Penumbra
The decay rate of light inside the defined Spread. The value describes the exponent for cosine of the angle between the axis and the sample point.