Realistic deep water shader How would you go about creating a realistic deep water shader to depict a scene such as this one from blue planet II? I tried with a volume scatterer but had mixed results. Ideally it would be amazing to tie the shader to the water's depth, thus simulating everything from shallow waters, twilight zone, and the deep.
All you need is the Principled Volume shader.

Create a volumetric cube
Give the volume a very light color, and use Density to control it
Use real units for light intensity (lumens). Related answer: Simulating a 40W Light Bulb.

Lights: 10 million lumens (a really strong searchlight), Density: 0.1, Samples: 2000 + Denoiser