As mentioned in another thread, vrayvolumegrids’ instancing does not work correctly. It would open up many possibilities with scattering plugins if this could be fixed.
Even a temporary solution such as forcing instancing to behave as copying might remedy some issues there currently are.
Hello,
Not only that it’s not working properly - it was never implemented in the first place. It is in the to-do list though - hopefully in the next couple of months we’ll get there 
Cheers!
Would it be possible as a temporary fix to have it instance as it does in copy mode now? That would at least make it usable in forest pack.
Will see what can be done as a quick workaround, but it’s possible that just copying the grids will eat up quite a lot of memory.
I’ll keep you posted..