Water rendering problem

Does the translucent material have any refraction? And can you post your material setups as well please?

I’m very new user want to test UE4 but I have 2 problems
Video link: Youtube

  1. I have unknown SSR bug with translucent water, opaque water is working normally
  2. The water color is darker when underwater

my material have refraction and this is my setup

my material have refraction and this is my setup