I’ve noticed that when a team mate has a flamer equipped, there will often being a flickering, oversaturated, lighting effect on the bottom half of the screen.
I’m not sure if it’s tied to them actually firing the weapon, but it certainly looks like it doesn’t belong.
I’ve especially noticed in the area event where you have to press a button to unlock a spiral staircase before the ‘cuastic road’ ( I think that was the name)