VRayToon and Material/Object IDs

[whtnoise]

I'm trying to use a VrayMultiSub map in the color slot of VRayToon to split out RGB values that can be used in composite. When the VRayMultiSub is set to face material id, it only seems to recognize id number 1. When object id is used, VrayToon uses the default color of VRayMultiSub.

I'm sure these two weren't intended to work together, but wondering if there's a way to accomplish this...

Any thoughts?