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aka Lightmapping.lightingDataAsset
This asset stores a bunch of data related to a lightmapping bake. This includes: * Light Probes for all scenes * Lightmap Scale and Trasnform for MeshRenderers
Just after a scene loads, Unity will read this data asset and apply the settings from it to restore the lightmapping. This happens in the player and at runtime.
This data is also read while computing Renderer Batching. It bakes the scales and transforms of MeshRenderers set in this file into the CombinedMesh
of the static batch.1)