1. As many have said, it should fade in and out, the longer the fade process the better.
2. The rain drop's white lines are WAY too thick. I the splash animation on the ground is very large so yes it is thick rain, but if its that thick make it a dark shade of grey instead if bright white. It should darken your vision, not brighten it via thick white lines all over.
As of right now, the rain animation hurts Xsyon more than it helps it. I'd disable it until it loses the extreme awkward factor.