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Visualization > Lights > About fall-off
About fall-off
Available for point and spot lights, fall-off simulates the natural fading of light as it travels through space. The intensity of the light gradually diminishes as it travels, until its fall-off distance is reached and it has little effect. Think of walking around a dark basement with a candle: you can only see as far as your candle will light, the rest being completely dark. On the other hand, a high-powered lamp could probably light every corner of the basement.
You can set fall-off to one of the following types.
None
The default for point and spot lights. No attenuation is used and the light will have the same effect on an object 3 feet away as one 2 miles further.
Gradual
This produces an attenuation following a gentle curve. The light intensity gradually diminishes until it hits the fall-off distance, at what point it only has 10% of its remaining intensity.
Rapid
This produces an almost immediate fading of light, similar to real-world lighting behavior.
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