CC characters with Vray in Blender

Now that Chaos had released a community version of Vray for Blender, I was messing around with rendering some of my CC5 characters in Blender.

However, when I use the built-in vray tool to convert material to vray node group, it doesn’t seem to work well with iclone/cc material node setups, and I end up with a black texture /model
Anyone have any recommendations, other than recreating the materials again from scratch?

Added a screenshot of the node setup of the PBR material which iclone/blender pipeline creates vs what gets created using the built-in V-Ray material converter