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Render Elements are a way to break out renders into their component parts such as diffuse color, reflections, shadows, mattes, etc. This gives fine control over the final image when using compositing or image editing applications to reassemble the component elements. Render elements are also sometimes known as render passes.

Render elements appear in the V-Ray Frame Buffer (VFB) and can be viewed from the drop-down at the upper left corner of the VFB. They can also be saved out of the VFB as many common file formats.

Render elements are generated at render time based on the user's selection before rendering. Most render elements have parameters that can be customized to further assist the composting process. These parameters are described on each render element's individual page.

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To enable the Denoise option, first enable the Denoiser from the Render Settings menu.

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Context Menu

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When you select render element(s), a context menu appears, allowing you to:

Remove – Removes the currently selected render element.

Remove All – Removes all render elements added to the scene.

New Folder – Creates a new folder to organize your render elements.

Presets – Allows you to create render element presets from your current setup.

Save All as Preset – Saves all the render elements in the scene as a preset.
Save Preset from Selection – Saves the currently selected render element(s) as a preset.

Show Help – Opens the documentation page for the selected element. If multiple render elements are selected, the one closest to the right-click's page is opened.

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Render Elements Manager

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The Render Elements window consists of three panels.

The left panel contains all of the V-Ray render elements. There is a search bar on top to help narrow down your search.

You can drag and drop a render element on its own to add it for rendering or add the whole group. Adding elements can also be done by double-clicking on them. The render elements are grouped into the following categories: Beauty, Advanced, Matte, Geometry, Utility, and Other.

The center panel lists the added render elements that are included in the VFB as render channels. Options are also available to Enable, Filter, and Denoise the render element.

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  • You can turn on and off each render element using the Enable option.
  • The Filter option toggles whether or not the Anti-Aliasing filter is applied to that render element. It is recommended to disable anti-aliasing for render elements such as Material ID and Object ID.
  • The Denoise option is disabled by default. It needs to be enabled from the Common tab of the V-Ray Render Settings. It reduces noise produced when rendering.

Properties are displayed on the right-hand panel, which offers control over the representation of the selected channel.

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How to manage Render Elements

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This section describes an example workflow to customize the render elements to be included in the V-Ray Frame Buffer.

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  • Creating folders can be done by right-clicking in the center panel and selecting New Folder.
  • You can duplicate folders by selecting and dragging them while holding CTRL.
  • Folders can be renamed by double-clicking on their names and typing out the new value.
  • You can add categories or individual render elements. Double-clicking on either adds them to the selected folder in the middle section.
  • To delete all the created folders, right-click and select Remove All.
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Categories

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All render elements are grouped into the following categories: Beauty, Advanced, Matte, Geometry, Utility, and OtherRaw.

Beauty – Contains all the needed render elements for elements for "Back to Beauty" compositing inside the V-Ray Frame Buffer.

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When selecting the Affect All channels option of VRayMtl,  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.

Advanced – Contains render elements for an advanced beautification of the light, coat, and sheen.
Matte – Contains all the needed render elements for matte compositing in the V-Ray Frame Buffer.
Geometry – Contains all the render elements responsible for editing geometries from the scene, such as Object ID, Normals etc.
Utility – Contains render elements that assist your work in the V-Ray Frame Buffer.
Raw – Contains render elements that concern RAW layers.

You can find the applied render elements in the dropdown menu in the VFB. The new render elements become visible in this list after a new render is started.

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Presets Options

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You can save your Render Elements setup, along with their Properties, for future use. This is done using the Preset options or through the Render Elements' context menu.  

To select multiple elements, hold Shift on your keyboard and click-select them.  

Load Presets in a Folder – Loads a single preset from a local directory into a folder, with the same name as the preset file. 

Load Preset – Loads a single preset from a local directory.

Save as Preset – Saves the current selection as a preset. If no Render Elements are selected, all of them are saved into the preset.

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Preset options

Supported Supported Render Elements

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V-Ray supports the following render elements. All render elements support native V-Ray materials.

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Render elementColor Depth of EXR floating-point channelsDescription

Raw Lighting

16bit/32bitRaw diffuse direct illumination before it's multiplied by the diffuse surface color.
Raw GI16bit/32bitRaw diffuse global illumination (not multiplied by the diffuse surface color). Only present if Global illumination is enabled.
Raw Total Light16bit/32bitThe sum of all raw lighting, both direct and indirect.
Raw Reflection16bit/32bitPure surface indirect reflection before it is multiplied by the reflection filter color.

Raw Refraction

16bit/32bitPure surface refraction before it is multiplied by the refraction filter color.
Raw Coat Filter16bit/32bitCreates a solid mask showing the areas of reflection in the Coat layer without being affected by Fresnel.
Raw Coat Reflection16bit/32bitPure surface indirect reflection from a V-Ray Material Coat layer before it is multiplied by the reflection filter color.
Raw Sheen Filter16bit/32bitHolds information similar to Sheen Filter RE, but without being affected by Fresnel.
Raw Shadow16bit/32bitRaw light that is blocked by other objects.

Raw Sheen Reflection

16bit/32bit

Pure surface indirect reflection from a V-Ray Material Sheen layer before it is multiplied by the reflection filter color.