Volume Fog (Light Fog)

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<Volume fog / light fog>

1. Render the Volume fog (light fog) seperately to have more controls in post.

2. Use black Surface shader of Matte shader to all the objects.

3. In Arnold, volume fog will show up in the Emission AOV which is problematic.

4. In Redshift, volume fog will show up in the VolumeLighting AOV and not in the Emission.

5. When dealing with windows ( very bright pixels ),
the bright pixels may have a jagged edge problem.
To cover this up, you can use two Glow nodes. One with a small sized glow and the other with larger sized glow.

6. Volume Ray is Great!!!