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Invisible – Controls whether the shape of the VRayLightMesh source is visible in the render result. When this option is turned off the source is rendered in the current light color. Otherwise, it is not visible in the scene. Note that this option only affects the visibility of the light when seen directly by the camera or through refractions. The visibility of the light with respect to reflections is controlled by the Affect specular and Affect Reflections options. See the Invisibility example below.

Skylight Portal – When enabled, the Color and Multiplier parameters are ignored; instead the light will take its intensity from the environment behind it.

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The following images demonstrate the No decay parameter. In the real world, the light sources attenuate with the inverse square of the distance from the light to the shaded surface. However, you can disable light decay to achieve behavior similar to the standard Maya lights. The settings for the light source the same for both images with the exception of the Decay parameter:

 

Section
Column
width10%20%

 

Image Removed No decay is off (default).

Column
width40%
60%
Before after
afterLabelOn
darktrue
beforeLabelOff
Panel
borderStylenone

Image Added

Panel
borderStylenone

Image Added

Column
width20%

 

 

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Anchor
invisible
invisible

Example: Invisibility

 

The example below shows the difference between an invisible mesh light and visible mesh light. 

Section
Column
width20%

 

Column
width40%

Image Removed No decay is on.

 

60%
Before after
afterLabeloff
beforeLabelon
Panel
borderStylenone

Image Added

Panel
borderStylenone

Image Added

Column
width10%20%

 

 

Anchor
singleSided
singleSided

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Example:

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Double-Sided Lights


This example demonstrates shows the difference between a single-sided and a double-sided planar area light.

 

the Double-Sided option enabled and disabled.

Section
Column
width10%20%

 

Column
width40%60%

Image Removed
Double-sided
is off.

 

Column
width40%

Image Removed Double-sided is on.

 

Before after
afterLabelon
beforeLabeloff
Panel
borderStylenone

Image Added

Panel
borderStylenone

Image Added

Column
width10%20%

 

 

 

 



Parameters - Sampling

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Subdivs – This parameter is disabled by default since most users will not need local control of subdivs, however, this parameter controls the number of samples V-Ray takes to compute lighting locally for this light. Lower values create more noise but render faster. Higher values produce smoother results but take more time to render. Note that the actual number of samples also depends on the Sampler settings. By default, this parameter is controlled by the Min Shading Rate in the image sampler. This parameter is not available when the renderer is set to CUDA.

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