Creating Light-Source Fog In Unity HDRP

Today I am creating some fog for light sources using Post Processing, for atmospheric effect.

Today’s Objective: Use the Post Processing module for fog to create Volumetric fog in my scene.

Volumetric Lighting & Fog:

“Volumetric Lighting”, also known as “God Rays”, is a lighting technique used in computer graphics to visualize light rays to a rendered scene.

Examples include seeing sun rays shining indoors through a window, or seeing light rays shining over a foggy mountain.

Volumetric lighting is used to give the effect of light passing through airborne particles such as dust, fog, or similar particles.

Creating Volumetric Lighting/Fog:

In order to create volumetric fog in Unity HDRP, there are a few steps involved, but overall the process is simple.

First, enable Volumetrics on the realtime light source.

Next, add a Post Processing Volume with a Fog module.

Now your lights (except area lights) will be volumetric, showing the light rays as if in fog.

Global (at least for that Volume) settings can be changed on the PP Volume…

… While Light-specific settings are on the light source.