Under water / above water split view, is this possible?

[som3on3]

@duke22

To expand on what some3one3 said, grab your water plane, rotate it 180 degrees so it faces down, assign an opaque material, tell it to write to a custom stencil, give it id 1. Add a flipped face “bucket” that contains your water, give it id 1 as well. Tell both of these objects not to render in the main pass, then mask your post effects in a material by stencil! This way it includes any displacement on your water plane.

Exactly
But i still didn’t find a way to add that cool line effect like in GDC
Anyone have code/ideea for that?