Illumination (CineRender Surface Channel)

Deactivate the Generate GI setting if a given surface should not have an effect on other objects.
On the right, the Receive GI option for the sphere’s surface has been disabled. This means that the sphere will no longer receive light reflected from the wall. The sphere’s self-illumination remains unaffected.
Below, on the left, another original scene: the sphere generates and receives GI but the Saturation value for the Generate GI option was set to 0%. The scene’s brightness remains constant but the sphere’s color information in the light it reflects is no longer present.
If a surface contains an active Transparency channel it can also be used in combination with the GI Portal parameter. This can improve the quality of GI in many instances, for example when sunlight radiates through a window into a room. Transparent surfaces such as windows will be sampled more closely for light passing through it.
Note: Only the Generate parameter is relevant when using volume caustics.
Generate Caustics Strength: Use the slider to set the strength of the effect.
Receive Caustics Strength: Use the slider to set the strength of the effect.
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