[MP2]

I'm not sure which weathers would cause that (but I imagine some would), but an alternative (which may actually be easier and less hassle to script) would be to have a black box textdraw over the player's entire screen with about 60% transparency, making it look dark. The only thing would be the actual lights in the game, on the ceiling, would be on, so that would be a bit odd. Sounds like a pointless feature tbh.