What data does one provide to show no volumetric lights in the whole of UC4? You'd need a video of the entire game. Videos of lights that aren't volumetric don't prove their absence across the entire game.
You can't prove the absence of something, i agree.
My comment wasn't especially about the volumetric lights.
But when you say something like that : "DOOM is on another level from UC4 technically. That's just a fact."
You should provide some evidence to support your point...