Hi all, any help with this much appreciated.

Is there a way to take a primitive (or point I guess) attribute on an object and pass it through to mantra without involving the shaders?

This is to create an id pass on a scene I have picked up without opening up the huge array of materials in the scene. I can of course go in and add bind exports and the like to feed to the extra image planes but this would be rather painful.

I see we have the op_id option but the help states this will change on each run of houdini which would seem to render it useless for this purpose?

Many thanks,
Richard.