Not sure if it’s been reported already or not, but just noticed that objects in a volumetric light wont cast proper volumetric shadows unless they are sub-d objects, and also have their displace type set to Parametric.
Render the attached scene and admire the lack of volumetric shadows :banghead:
Then hit tab, re-render and watch them appear :bounce:
I havent downloaded the scene but it think there was some issue with Volumetrics Shadows in the past…we had to turn something on (World or Cube Enviroment) i might be completly wrong of course, if so ignore my post 
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