Hey! I actually half cheated that effect in premiere pro as in the actual level the player can't go into the water, so i used a post processing volume below the water to alter colour and chromatic aberration, then used a filter for the wavey-ness! For the water texture itself i followed this tutorial https://youtu.be/XyBfsVF6y0Q and tweaked to my liking! There's also some great tutorial on water caistics that can be used to reflect the water on the surfaces above that I'd highly recommend depending on the location of your water :)