1 sided material to see into a room from exterior in vray for maya

[brandeland]

So I've built a room that I need to be able to see into from the exterior.

 

In Mental Ray I would just uncheck the double sided option under render stats for the wall. This option does not affect vray.

 

To achieve a similar effect in vray, I'm using a 2sided vray material with the wall material on the inside and a transparent material on the outside.

 

This worked until I wanted to export render passes. Since the entire room is seen through the transparent material, the only pass that has any info is the refraction pass.

 

Is there a way to get a single sided material that works with the vray pass system the way I would want?