Multiple light_environment in one map; How does it work?

[PikaCommando]

Some maps in the WC Mappack has multiple light_environment entities even though all the mapping tutorials and documentation for Goldsrc and Source alike say not to have more than one light_environment in one map.

For example, demo_matgallery01 has a light_environment entity for each set of windows in the map so light shines in different direction for each set of windows, yet there doesn't seem to be any lighting conflict or problems. So how come it works fine there? Does each sky brush only choose the nearest light_environment as its light-emitting setting while ignoring the rest or what?

[ComDoll]

I assume it's the latest because sunlight would end abruptly if light_environment is located too far.