This is an optimized rain VFX which follows each player locally. This means that it isn't replicated, so it isn't run on server side.
This allows to have one single VFX system in the level and rain particles spawned for each player locally and players don't see other players particles.
You can control multiple parameters.
And if you want even more optimization you can disable splashes and generated events and switch streaks emitter from CPU to GPU.

Rain ripples material function is now included with simple example water material! You can use material function in your materials to easily add rain ripples!