Deep Sea Fog

Within the title is the words “Deep Sea” implying a hint as to the visual look of this project. Water being denser then air naturally absorbs light much more effectively overly the same distance. This creates a steep fall off in visibility, an effect similar to fog.

To create this Atmospheric Fog there are a few methods I could use, the most direct would be to create the fog using a particle system or Rendering a volume using a volumetric density shader. These methods are hard on render times and scene complexity. Instead I will create this effect in post. To do so I will require a the Depth information of the scene, which I can gain access to by rendering a depth pass based off the Depth limits set on the camera.

Once rendered the Depth pass can be used to overlay a fog layer within the compositor.