Lighting AOVs

A Lighting AOV isolates the light source's contribution. Each light pass behaves as if all the other lights in the scene are switched off. You can combine individual lighting passes together to recreate the original render in post, or to further adjust the individual contributions of each light during post. There are three categories of lighting AOVs:

Light - These AOVs capture the overall qualities of lights.
Light Direct - Captures only the direct light contribution to a specified light ID.
Light Indirect - Captures only the indirect light contribution of a specified light ID.

The following lighting AOVs are available for each of the three lighting categories of AOVs (Figure 1):

Light IDPass 1-8 - Captures Mesh emitter contributions. Texture and Blackbody emitters have a Light Pass ID pin assigning an emitter to a light pass. It’s possible to assign multiple emitters to the same light pass. If nothing is configured, all emitters contribute to Light Pass 1.
Environment - Captures ambient light from the sky in a Daylight environment, or from the texture in a Texture environment.
Sunlight - Captures the sun's light contribution. This only works when you configure a Daylight environment.

Figure 1: Available Lighting Passes

To use lighting AOVs in OctaneRender^®, you need to identify and map each light emitter to the desired light pass by adding the Octane OBJ Spare Parameters node to the Emission objects.

Figure 2: Adding the OBJ Spare Parameters to an object

In the Light Emission, tab you can assign the Light Pass ID for that object (Figure 3).

Figure 3: Setting the Light Pass ID

This can also be done by assigning the Light Pass ID in each of the emission nodes or Octane lights that are in the scene (Figure 4).

Figure 4: Setting the Light Pass ID in a Blackbody emission

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