Basically, the water has a visual glitch where, for some reason, I can x-ray very lightly when in water along the edges. Why is this happening? I have no idea, but it seems to be happening when a door is surrounded by water. It might work with other non-full blocks, but this is what I've got so far.

Edit: It appears to work when inside ANY block that is not waterlogged whilst surrounded by water, even barrier blocks, which are full blocks.