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The Light Select Render Element represents the lighting contribution from one or more user-selected lights in the scene. Each Light Select channel can output one of the predetermined contribution types like the overall direct or indirect illumination or the direct or indirect diffuse or specular contribution to the illumination. The Full mode essentially creates a Beauty render for just the included light(s). The Light Path Expression mode allows for custom contributions to be captured. See the Light Path Expressions page or the Courseware page for more information.

Multiple Light Select outputs can be rendered for a single scene, and lights may be included in more than one Light Select render element.

By using the Light Select render element, specific lights in the resulting render can be captured and adjusted (color, temperature, brightness, etc.) in a composite without the need to re-render. For example, a Light Select element for all of the backlights in a scene, an artist may adjust the backlighting in the composite, without affecting the rest of the scene's illumination.

 

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titleUI Path: ||Display Render Settings button|| > Render Elements tab > Light Select
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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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The Light Select acts as a standard Maya set. By default, it is empty when and you can easily add lights from the scene to it:

 

  1. Create a Light Select from the Render Elements tab of the Render Settings window.
  2. From the Outliner, drag one or more lights with the middle-mouse button to the vrayRE_Light_Select element.

 

Alternatively, Maya's Set editor can be used to add or remove lights from the Light Select set(Windows > Relationship Editors > Sets).

 

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Light Select Types

 

Insert some basic diagram here showing

Full = direct+indirect // note that refraction and SSS need to be added separately

direct = direct diffuse + direct specular

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Common Use: Changing Lighting in Composite

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