implicit integers (and other values) inside v-ray proxy

[cgdom]

Hopefully i'm not over complicating this, but I would like to assign a different color from a ramp to each mesh item in a v-ray proxy (new one). I currently have an object ID spot info node and the setup works until the meshes are inside of a v-ray proxy, at which point the whole proxy becomes one ID. I read elsewhere on the forum that object ID's are not supported in the proxies which is obviously a huge limitation.

Is there any other value that exists implicitly in the v-ray proxy already that one could access via a vray user scalar, integer or any other mechanism ? If not, what would be the best way to achieve this simple task ?

[hermit.crab]

Not sure I understand, could you clarify your material setup? Otherwise, I've tested a simple setup with a multi-subtex based on Object ID's and it seems to render as expected post proxy export (see attached file).