Railclone. Random Materials Id's not working

[EK2965]

I am trying to create a random audience with rail clone.  To do this I am using the random material ideas for the plane with the people.  It looks like it is working in the view port but when I go to render, it uses the same material id for all the people.  I also tried doing this with randow segments, but then all the material ids go messed up.  Can you please let me know if I am doing something wrong or does this just not work.

[iToo]

Are you using Mental Ray ? If so, please turn off Display->VRay/Mental Ray shader. The Material operator is not compatible with the instancing support in Mental Ray.

http://www.itoosoft.com/railclone/reference/refoperators.php#material

About the random segments, it should work. Remember you must use an unique material (in this case a multi-sub), that must be assigned to the RC object. If you cannot get it to work, please send us a test scene.

[EK2965]

Thanks, turning that off did help, thanks. 

So for each RailClone object you can only have one material assigned?

[iToo]

Yes, RailClone doesn't handle materials by itself. It uses the material assigned to the object.