When its going to rain, sky should turn dark, right? But when the sky color is determined by sun enabled, we can't change the sky color with the parameters given in BP_SkySphere. Also, It is not a good idea to disable that option if we want to have a time of day system. Today, I am going to show you a way to change the sky color while keeping sky color is determined by sun enabled. SO at any time of the day, we can make the sky darker when its about to rain.