This would help with maps that are partly outside and inside where the inside is dark and it is day outside. So I would like to be able to "paint" global light onto the map. Example: In the Phandalin module, you go to Cragmaw Castle, the inside is dark, but the outside is not. There is no "variable global light", so I had to throw down light sources outside of the castle since setting the entire map as lit was a no-no.