Adds distance and height-based fog to the scene. Features several color modes:
Fog will be a single color
Samples a horizontal gradient texture from left (near) to right (far). Will expose a
distance parameter to control the length of the gradient.
Fog will take on the color of the skybox, making it seamlessly blend in. This feature is not available in the LWRP due to highly inconsistent API changes between the various versions.
Height fog density can be controlled by supplying a grayscale texture.
The light scattering feature will perform another bloom pass inside of the fog