Rain in real life has more transparency in the raindrops and it doesn't look like long straight lines. I'd be a good idea to have a think about the rain texture droplets in my opinion. Such as more transparent and maybe quarter of the length, have to play around a bit.
Yah, water is a transparent body, no one can see water droplets unless some light is fallen over it. It will be better if they water droplet reflections on the surfaces only and instead of straight line s in front of us !!!
