ver. 4.0.6  
  mental ray  
  FumeFX supports local rendering with mental ray renderer while network rendering is possible with purchase of additional mental ray rendering licenses. Each render node license is not limited to a set number of CPUs, simply on machine.

In contrast to 3ds Max where FusionWorks is required to properly blend multiple volumetric effects, multiple FumeFX grids will properly mix in mental ray by enabling the Auto Volume option.

Prices for mental ray render nodes are per machine (CPU unlimited).

$60 - up to 10 nodes
$40 - 11 - 25 nodes
$30 - 26 - 100 nodes
$20 - 101 - 250 nodes
$15 - 251 - 500 nodes
$6.000 unlimited