Matte object on back faces

[bender83]

I have an undulating plane that my camera sees both the top and bottom of - how might I matte the back side?

[chakarov]

Hi bender83 , simply enabling "matte Surface" of V-Ray Object Properties > Matte/Shadows, or in V-Ray MtlWrapper seems to work for me. May be I am doing something different from you,any chance for a simple scene ?