Why is it not in the game already? I thought you wanted to make a faithful recreation on how it was back then? One of the most impactful memories i have was leveling my undead in Tirisfal glades and being hit by this storm with howling winds and fog all over.
Well let me tell you something, stepping from one zone to another and suddenly being bombarded by a rain efect that follows you around and changes direction depending on your movement is lame (if you don’t know what i mean, find a zone with rain and move left and right, note how the raindrops change direction mid-air)
Here’s a video displaying vanilla rain, compare that to what you see ingame.