Fog

Valve has kindly provided us with one of the nicest volumetric fog system there is. Area Light support has been appended to them and it just works when you use them. 

It really helps when trying to build a mood to the scene.

One thing that stood out while working on this was that fog was on an SDR color system, it wasn’t giving much emphasis on the highlights of the new lights and would never glow.

Volumetric fog now renders in an HDR color space, This allows for greater emphasis on the bright lobe of the fog.