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Isotropic Light Distribution (Photometric Lights) 1323

usedasalensshaderorvolumeshader. When

used as a lens shader, the aerial perspective “mist”

applies to primary rays only; it doesn’t appear

in reflections. When used as a volume shader,

it applies to the entire scene and every ray in it,

including reflections and refraction.

V isibility Distance—Aerial Perspective is a term

used by painters to convey how distant objects are

perceived as hazier and tinted towards the blue

end of the spectrum. mr Sky emulates this with

the Visibilty Dist ance p arameter. When nonzero,

it defines t he “10% distance” , th at is, the distance

at which approximately 10% of haze is visible at

a Haze level of 0.0.

Is otropic Li ght Di str ibuti on

(Photometr ic Lights)

Create panel > Lights > Photometric Lig hts > Click Target

Point or Free Point. > Intensity/Color/Distribution rollout

> Choose Isotropic in Distribution list. > Click in viewpor t

to create light.

An Isotropic light distributes the light equally in

all directions.

Isotropic light distribution

Icon for Target Point light with isotropic distribution