Same for me : sometimes, changing zero colon nearly nothing will spoil the whole image, and no way to step back. So I keep trying to understand. Somehow, in "volumetric", I feel that we don't see the light reflected from the object itself, but see, what the atmosphere between the objects makes out of that light. The fun in Vue is, when it works, inspite of all struggle and effort. I'll get some sleep befor real sun rises, it's half past four. Good luck !