Transparent Front Faces

[Anonymous]

How I can render the front faces of an object transparent?
I tried to set sc.out.t to Black but it acts like matte...
How can I get the color of the rendered fragment behind my object?

I tried:

 IllumParams ip;
 ip.hasComponents != HAS_OPACITY;
 //sc.out.t = tmp;
 int nEles = sc.NRenderElements()
 for&#40; int i=0; i < nEles; ++i &#41;{
 IRenderElement* pEle = sc.GetRenderElement&#40;i&#41;
 if&#40; pEle &#41; {
 MaxRenderElement* pMaxEle = &#40;MaxRenderElement*&#41;&#40;pEle->GetInterface&#40; MaxRenderElement::IID &#41;&#41;
 if&#40; pMaxEle && pMaxEle->IsEnabled&#40;&#41; &#41;{

 pMaxEle->PostIllum&#40; sc, ip &#41;
 }

 }
 }
 
 sc.out.c = ip.finalC;
 sc.out.t = ip.finalT;