The space around the origin of your map (0,0,0) determines the color of the indirect lighting of the entirity of your map. https://www.reddit.com/r/forge/comments/3yd1ot/the_space_around_the_origin_of_your_map_000/ I came across this video I think somewhere on Forgehub this morning but then it vanished. So I am posting a thread on it.
Did you watch the video? If you haven't, you should. It's pretty self explanatory, whereas it may not make any sense if someone just tried to explain it to you. http://xboxdvr.com/gamer/Vlad356/video/13482822
I guess I missed the video link. Interesting though, so it's like the lighting on the map sort of reflected the color of his purpley Goldeny box & took out the window reflections? Crazy.