If you are using Digital Fusion for making VFX and quickly need some god rays, fake volume light etc. I have made a macro to do the trick for you instead of having to spend way too much on buying a plugin. It has some nice features like flickering and noise but also a couple of bugs when trying to make an instance copy of it. So I advice not to do that until I make a new version.
Download here God Rays Macro for Fusion v11
If you make something cool with it I would love to see it! :-) firstname.lastname@example.org
A framegrab from youtube shows the use of the macro on top of several layers of particles for the Lord Garmaddon FX.