Possible to have material variations of tyActors, when each consists of multiple IDs

[Alexx31]

Hello again,
I was trying now "render as instances", but the material is not shown.
All I have done is setting up an instance material operator with a greyshader and the mesh operator with "render as instances".

Is there anything else to change?

I am using actors and my aim is later to get randomly different multi/sub-material assigned.

Attached a screenshot,

thanks