Bake Lighting Data with GI (Indirect) Only Lights
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Summary
In some scenarios you may want to author lights that affect only indirect lighting of an area of your scene.
Use Case / Intended Outcome
This feature enables you to create and place lights that are only seen by Lightmapper.
An example use case is a cave, where sunlight penetrates through a hole in the ceiling and the sunlight bouncing off the floor does not emit strong enough lighting bounces. With “Bake lighting data with GI (indirect) only lights” you can choose to adjust the indirect component of the sunlight, so that it either emits more or less indirect lighting.