After a lot of tries and quite a bit of experimenting, I’ve managed to make an underwater post-process material that only shows on the part of the view which is underwater! It is still Work In Progress, which is why it is in this section. Here is what it looks like:
That looks awesome! Are you developing this for a game? I’d love to use something like this for the game my team and I are developing. I’m excited to see what else you create. Keep up the good work!