So I have a flame. No smoke whatsoever. The background is perfectly white and the problem is that the volume emission shader isn’t showing through. How do I make it show through?
on the world node setup, add a mix node with a white background and a black background, and use the light path Is Camera to mix both, so the white background is only visible to the camera.
Or maybe render with alpha, transparent backgrount and mix it later in compositng.
The only problem is that I have other objects in the scene that need the background to be white to be properly displayed. If I could have the background only appear black to light that has interacted with any type of volume… then it would work.
PS: I just tried what you suggested and it didn’t work. 
PPS: I changed the volume emission node to a volume absorption node and that fixed the problem! Thanks anyways!