I have this kind of weird scene I'm working on where I have a cube of water (principled shader with transmission set to one and IOR of 1.333). Inside of that cube is a plane where I'm using a gradient mask make the plane either fully transparent or just slightly.
Any sugestions how to accomplish this? I'm guession screen space reflections/refractions and alpha settings on the materials matters but I can't figure out how to set them
Blend file is attached but missing hdri. download file