When working with physically-based materials, this value the luminous flux of the light source.
When working with photometric lights (see the IESProfileURL property) or physically-based rendering (see SCNLightingModelPhysicallyBased), you can leave the color property at its default white color and use the intensity and temperature to control the light using realistic parameters. The luminous flux, in lumens, or total brightness of the light. Higher values have little visible effect. A value of 1.0 specifies a linear transition, and a value of 2.0 (the default) specifies a quadratic transition curve.
XOJO SHADOW FULL
At distances in between the start and end distance, the light’s intensity transitions from full to no illumination according to the value of this property.Ī value of 0.0 specifies no attenuation-the light’s intensity is the same at all distances. You can apply attenuation to omnidirectional lights and spotlights, causing their intensity to diminish over a specified range of distances. The transition curve for the light’s intensity between its attenuation start and end distances. You can animate changes to this property’s value. The default value is 0.0, specifying no attenuation (the light’s intensity is the same at all distances). At distances in between the start and end distance, the attenuationFalloffExponent property defines the transition from full illumination to no illumination. At distances greater than the end distance, the light provides no illumination. At distances less than the start distance, the light’s illumination is at full intensity. The distance from the light at which its intensity is completely diminished.
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