I'm feeling pretty bummed right now... my project's main hub map has severe performance issues during night time, when all its light sources are turned on. I've combed through the map several times doing optimization passes, but there's only so much I can remove before it starts detracting from how I envision the map to look and function. I had a previous thread regarding this issue, but I figured I might perhaps get more specific help if I were to post a small demo, containing only the bare minimum for the hub map in question to work properly. I've stripped it down as much as I could, but I did keep a couple of bells and whistles, simply because they might be part of the problem. If anyone with some free time could take a look at my project and tell me what I'm doing wrong, and perhaps offer me some insight on how to potentially alleviate the stark FPS drops, it would be greatly appreciated! (I am aware at the very least that the Tile Swap method I'm using for doors is terrible. I did it this way simply because I couldn't find a better solution to handle shifting them from darkened to lit, independently of their state.) Anyway, here's the link. Hopefully ~25 MB isn't too big for those with draconian data caps. (Link removed for now. I'll upload an updated version at some point.) Thanks beforehand!