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UI Expand
titleUI Path: ||Display Render Settings button|| > Render Elements tab
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To use render elements, select from the Available render elements column and click the Add button to add the passes you wish to generate at render time. When you render the scene, the added render elements listed in the column on the right, will also render, which can be viewed from the VFB window's channel drop-down menu.

For more information on the parameters on this dialog, see the Render Elements tab page.

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Render Elements in V-Ray break down into four major groups: 


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Beauty Render Elements


The Beauty Render Elements are the primary render elements that form V-Ray's 
pre-composited final render pass known as Beauty or RGB Color. These include the
Lighting, Global Illumination, Reflection, Refraction, Specular, etc.

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Matte Render Elements

 

The Matte Render Elements aid selection masking in the compositing process. 
These include the Material ID, Multi Matte, Object ID, and Render ID Render Elements.

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Geometry Render Elements 

 
The Geometry Render Elements rely on geometry to generate geometry data for the compositing 
process. These include the Velocity, Z-Depth, and Normals Render Elements. 

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Utility Render Elements

 
The Utility Render Elements give insight into how V-Ray is running and extra functionality for compositing. 
These include the Distributed Render ID, Sample Rate, Denoiser, Extra texture, etc.

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List of Supported Render Elements

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In order to render a correct Raw render pass, you need to also render the corresponding main element and filter. For example, Raw Reflection will require you to render Reflection and Reflection filter. For Raw GI, you need GI and Diffuse, etc.

Select--Total LightTotalLightTotal lighting in the scene
Render elementMaya node nameColor Depth of EXR floating-point channels*Description

Atmospheric Effects

vrayRE_Atmospheric_Effects16bit/32bitAtmospheric effects, such as Environment Fog.

Back to Beauty

–16bit/32bitExpands as all beauty elements for the actual rendering.

Background

vrayRE_Background16bit/32bitImage background, such as any Background Texture specified in the Environment overrides.
Bump Normals vrayRE_BumpNormals16bit/32bitNormals generated by bump maps, in screen space (which is not the same as camera space). Use the VRaySamplerInfo utility texture node to get the normals in camera, world or object space.

Caustics

vrayRE_Caustics16bit/32bitThe caustics on the material. These caustics are present only when the Caustics option of V-Ray is enabled. This channel does not include GI caustics.
Coat SpecularvrayRE_Coat16bit/32bitDirect surface specular highlights coming from the VRayMtl Coat layer used in the scene.
Coat FiltervrayRE_Coat_Filter16bit/32bitReflection filter for VRayMtl Coat layer.
Coat GlossinessvrayRE_Coat_Glossiness16bit/32bitReturns a float value that corresponds with the Coat Glossiness value of the VRayMtl Coat layer.
Coat ReflectionvrayRE_Coat_Reflection16bit/32bitIndirect reflections coming from the Coat layers of VRayMtl used in the scene.
CoveragevrayRE_Coverage16bit/32bitFor each pixel, the final values for the render element are taken from the object that makes the largest contribution to that pixel.
CryptomattevrayRE_Cryptomatteforced 32bit (for multi-channel files)Uses the Cryptomatte convention by Psypop to encode mattes into multichannel OpenEXRs.
Custom ColorvrayRE_Custom_Color16bit/32bitA generic render element container. Use the Alias value to specify which render element it should be used as.
DR BucketvrayRE_DR_Bucket16bit/32bitIdentifies the render node responsible for rendering a bucket during distributed rendering.
DiffusevrayRE_Diffuse16bit/32bitPure diffuse surface color.
DenoiservrayRE_Denoiser16bit/32bitApplies a denoising operation to the image after it is rendered (with the neccessary channels).
Extra TexturevrayRE_Extra_Texforced 32bit (optional for multi-channel files)Renders the entire scene with a single defined texture mapped on all objects.
Global Illumination (GI)

vrayRE_GI

16bit/32bitThe diffuse surface global illumination. Only present if Global illumination is enabled.
Light Select LightMix

vrayRE_Light_

Mix

16bit/32bitExtracts the contribution of a userAdjusts intensity and color of lights and light emitting materials during and after render directly from the VFB.
Light Select vrayRE_Light_Select16bit/32bitExtracts the contribution of a user-defined light or a set of lights in the scene as a separate render element.
Light Path ExpressionsvrayRE_Light_Select–A tool for extracting specific lighting events from the scene to a separate channel.

Lighting

vrayRE_Lighting16bit/32bitDiffuse direct surface lighting.
Lightning AnalysisvrayRE_Lightning_Analysis16bit/32bitProvides visual representation of the lighting intensity within a rendered frame.
Material ID vrayRE_Material_ID–Material ID of scene objects.

Material Select

vrayRE_Material_Select16bit/32bit

Renders only the object(s) assigned to a user-specified V-Ray compatible material. The material can be a top-level material or a sub-material of a VRayBlendMtl.

Matte Shadow vrayRE_Matte_shadow16bit/32bitMatte shadow part of the image.
MetalnessvrayRE_Metalness16bit/32bit

Creates a black and white image, which can be used as a metalness mask when creating PBR shaders.

Multi Matte vrayRE_Multi_Matte16bit/32bitCreates selection masks based on an object ID or material ID.
Multi Matte IDvrayRE_Multi_Matte_ID16bit/32bitReturns an integer value in the image that corresponds to the value of the object's multiMatte ID #.
Noise LevelvrayRE_Noise_Level16bit/32bitCreates a monochromatic image showing the amount of noise in the render.
NormalsvrayRE_Normals16bit/32bitSurface normals in camera space. To output the normals in screen/object/world space, use Maya's Sampler Info utility texture node.

Object ID

vrayRE_Object_ID–Returns solid un-shaded colors to represent a numerical identifiers set through that object's Attributes, Object Property, or assigned material. Useful for selection masks. EXRs and .vrimg formats store as integer values.
Object SelectvrayRE_Object_select16bit/32bitRenders only the object(s) called out with a specific Object or Material ID. This effect is reversible to create a render element that excludes a particular object or objects according to Object or Material ID.
Raw Coat FiltervrayRE_Raw_Coat_Filter16bit/32bitCreates a solid mask showing the areas of reflection in the Coat layer without being affected by Fresnel.
Raw Coat ReflectionvrayRE_Raw_Coat_Reflection16bit/32bitPure surface indirect reflection from a VRayMtl Coat layer before it is multiplied by the reflection filter color.
Raw Diffuse FiltervrayRE_Raw_Diffuse_Filter16bit/32bitA solid mask of raw diffuse surface color information not affected by fresnel falloff.
Raw GIvrayRE_Raw_GI16bit/32bitRaw diffuse global illumination (not multiplied by the diffuse surface color). Only present if Global illumination is enabled.

Raw Light

vrayRE_Raw_Light16bit/32bitRaw diffuse direct illumination before it's multiplied by the diffuse surface color.
Raw ReflectionvrayRE_Raw_Reflection16bit/32bitPure surface indirect reflection before it is multiplied by the reflection filter color.
Raw Reflection FiltervrayRE_Raw_Reflection_Filter16bit/32bitA solid mask of raw reflection information not affected by fresnel falloff.

Raw Refraction

vrayRE_Raw_Refraction16bit/32bitPure surface refraction before it is multiplied by the refraction filter color.
Raw Refraction FiltervrayRE_Raw_Refraction_Filter16bit/32bitA solid mask of raw refraction information not affected by fresnel falloff.
Raw ShadowvrayRE_Raw_Shadow16bit/32bitRaw light blocked by other objects.
Raw Sheen FiltervrayRE_Raw_Sheen_Filter16bit/32bitHolds information similar to Sheen Filter RE, but without being affected by Fresnel.
Raw Sheen ReflectionvrayRE_Raw_Sheen_Reflection16bit/32bitPure surface indirect reflection from a VRayMtl Sheen layer before it is multiplied by the reflection filter color.
Raw Total LightvrayRE_Raw_Total_Light16bit/32bitSum of all raw lighting, both direct and indirect.
Reflect IORvrayRE_Reflect_IOR16bit/32bitStores floating-point information that corresponds to the Fresnel IOR values of scene objects' materials.
ReflectionvrayRE_Reflection16bit/32bitAll indirect reflections from a surface.
Reflection Filter vrayRE_Reflection_Filter16bit/32bitReflection filter (the color by which the raw reflections are multiplied to give the final surface reflection). This may be considered an alpha channel for reflections.
Reflection GlossinessvrayRE_Reflection_glossiness16bit/32bitReturns a float value that corresponds with the Reflection Glossiness value of an object's material.
RefractionvrayRE_Refraction16bit/32bitRefractions through a surface.
Refraction Filter vrayRE_Refraction_Filter16bit/32bitThe refraction filter mitigates the raw refraction layer. This render element returns the color by which the raw refractions are multiplied to give the final surface refraction. This may be considered an alpha channel for refractions.
Refraction GlossinessvrayRE_Refraction_glossiness16bit/32bitReturns a float value that corresponds to the Refraction Glossiness value of an object's material.
Render IDvrayRE_Render_ID–Node render ID of the object that contributes most to the pixel value.
Render TimevrayRE_Render_Time16bit/32bitShows a floating-point number for each pixel's render time measured in milliseconds.
SSSvrayRE_SSS16bit/32bitRenders just the subsurface part of the VRaySSS2 material on a separate layer.
Sample Rate vrayRE_Sample_Rate16bit/32bitShows an image where the pixel brightness is directly proportional to the number of samples taken at that pixel.
Sampler InfovrayRE_Sampler_Infoforced 32bit (for multi-channel files)Provides information about various aspects of the shaded points - position, normal, bump normal, reflection/refraction vectors and UVW coordinates. Can be used e.g. for world position passes or normal passes.
Self Illumination vrayRE_Self_Illumination16bit/32bitSelf-illumination of the surface.
ShadowvrayRE_Shadow16bit/32bitDiffuse light that is blocked by other objects.
Sheen SpecularvrayRE_Sheen16bit/32bitDirect surface specular highlights coming from the VRayMtl Sheen layer used in the scene.
Sheen FiltervrayRE_Sheen_Filter16bit/32bitReflection filter for VRayMtl Sheen layer.
Sheen GlossinessvrayRE_Sheen_Glossiness16bit/32bitReturns a float value that corresponds with the Sheen Glossiness value of the VRayMtl Sheen layer.
Sheen ReflectionvrayRE_Sheen_Reflection16bit/32bitIndirect reflections coming from the Sheen layer(s) of VRayMtl used in the scene.
SpecularvrayRE_Specular16bit/32bitAll direct specular highlights coming from a surface.
ToonvrayRE_Toon16bit/32bitStores results of V-Ray Toon rendering effect.
Toon SpecularvrayRE_Toon_Specular16bit/32bitStores Toon Specular reflection (highlights) information calculated from the VRayToonMtl.
Total LightvrayRE_Total_Light16bit/32bitTotal lighting in the scene, both direct and indirect.
Unclamped ColorvrayRE_Unclamped_Color16bit/32bitThe unclamped or adjusted image color before Color Mapping settings are applied.
VelocityvrayRE_Velocity16bit/32bitSurface velocity of an object. This render element is useful for generating motion blur in post-production.
Z-depth vrayRE_Z_depthforced 32bit (for multi-channel files)Z-depth of surfaces in the scene.
VRScans Paint MaskvrayRE_VRScans_Paint_Mask16bit/32bitAllows color changes to a V-Ray Scanned Material in compositing.
VRScans Zone MaskvrayRE_VRScans_Zone_Mask16bit/32bitShows the zone that is a map of the sub-materials. The rendered image is monochrome. The white color specifies the selected zone, whereas the black color specifies the other parts of the image.


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* For all image formats except EXR the render elements depend on their respective channels' output settings.

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Fancy Bullets
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  • V-Ray always anti-aliases with respect to the RGB Color channel. Therefore, other channels may appear jagged or noisy in areas where V-Ray has placed fewer samples.
  • Render elements will render in Distributed Rendering mode.
  • Render elements require additional storage when rendering and thus increase the amount of RAM used during rendering. When rendering to the V-Ray VFB, you can reduce this by rendering directly to a .vrimg file on disk and not storing the final image in memory.
  • Render elements may slow down the final image rendering a little bit, depending on the number of elements that are selected. They have no effect on GI/reflection, etc. calculations.
  • Since V-Ray Next, the Reflection Hilight Glossiness has been removed from the UI as it can no longer be controlled separately from the Reflection Glossiness in VRayMtl. As there will be no difference between the Reflection Hilight Glossiness Render Element and the Reflection Glossiness one, the Reflection Hilight Glossiness Render Element is no longer available.
  • When selecting the Affect All channels option of VRayMtl/VRayToonMtl,  be aware that the information of the respective component will affect all render elements, therefore the Back to Beauty composition will not match the RGB result from the renderer.

 

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