Data of a lightmap.
A scene can have several lightmaps stored in it, and Renderer components can use those
lightmaps. This makes it possible to use the same material on multiple objects, while
each object can refer to a different lightmap or different portion of the same lightmap.
See Also: LightmapSettings class, Renderer.lightmapIndex
| lightmapDir | Lightmap storing only the indirect incoming light. |
| lightmapLight | Lightmap storing the full incoming light. |