Make toon not affect other objects?

[LARV]

I have a map of the US and used the toon material to make outlines on the map.

But when I add toon to the map, the outlines also follow objects placed on the map. How do I prevent this from happening?

Thanks!

[TedVitale_CG]

What version of V-Ray for Sketchup are you using? Window->Preferences->Extensions and then click on V-Ray for SketchUp. You should see the version number listed in the details at the bottom of the window.