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Class

Light

Synopsis

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Simulates light from an area source (a quadrilateral, specified by four vertices). Can be used to model light from an extended source (fluorescent strip lights) or in some circumstances from a window.

 

 

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vertices

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MultiExcerptNamevertices

Defines the four corner points of the shape of the quad light. These vertices must define a flat and rectangular quad.

resolution

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When a shader is connected to a quad_light, Arnold will automatically construct importance sampling tables similar to those used in the skydome_light. This permits efficient sampling according to the luminance of the texture, which can greatly reduce sampling noise, especially when using HDRI textures. Like the skydome_light, the resolution of the table is controlled by the resolution parameter with a default value of 512. If you are using a color image as an input, then you will not need to set this value higher than the resolution of the image passed to the color parameter.

roundness

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MultiExcerptNameroundness

Changes the shape of the light from a square at 0, to rounded corners, to a disk at 1.

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includeLabelroundness
sortsize

soft_edge

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Specifies a smooth falloff for the edges of the light. The value specifies the width of the soft edge, from no soft edge at 0, to smooth falloff all the way to the light center at 1. Works similarly to the penumbra_angle for spot lights.

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includeLabelsoft_edge
sortname

spread

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nopaneltrue
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portal

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If enabled, the quad_light works as a portal.

matrix

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nopaneltrue
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color

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MultiExcerptNamecolor
nopaneltrue
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intensity

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MultiExcerptNameintensity

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MultiExcerptNameintensity
nopaneltrue
PageWithExcerptLights

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columns2
includeLabelintensity

exposure

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MultiExcerptNameexposure

Multiexcerpt include
MultiExcerptNameexposure
nopaneltrue
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Center

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columns2
includeLabelexposure

cast_shadows

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MultiExcerptNamecast_shadows

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nopaneltrue
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cast_volumetric_shadows

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MultiExcerptNamecast_volumetric_shadows

Multiexcerpt include
MultiExcerptNamecast_volumetric_shadows
nopaneltrue
PageWithExcerptLights

shadow_density

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MultiExcerptNameshadow_density
nopaneltrue
PageWithExcerptLights

shadow_color

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MultiExcerptNameshadow_color
nopaneltrue
PageWithExcerptLights

samples

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MultiExcerptNamesamples

Multiexcerpt include
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nopaneltrue
PageWithExcerptLights

normalize

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MultiExcerptNamenormalize
nopaneltrue
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diffuse/specular/sss/volume

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MultiExcerptNameper_light_scaling
nopaneltrue
PageWithExcerptLights

indirect

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nopaneltrue
PageWithExcerptlights

max_bounces

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nopaneltrue
PageWithExcerptLights

filters

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nopaneltrue
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aov

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nopaneltrue
PageWithExcerptlights

volume_samples

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MultiExcerptNamevolume_samples
nopaneltrue
PageWithExcerptLights

motion_start

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MultiExcerptNamemotion_start
nopaneltrue
PageWithExcerptlights

motion_end

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MultiExcerptNamemotion_end
nopaneltrue
PageWithExcerptlights

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