Problems with opacity/alphas

[dgibson]

I was wondering if anyone can help me, I have a piece of geometry with a vray material applied to it with a bitmap in the refraction slot creating transparent cuts in the geometry yet it does not seem to be creating an alpha channel, does anyone know why?

[PeZiK]

You must apply "Affect Alpha" in the Vray material ( Right to the Translucent ).

Tip : Apply also "Affect shadow" to get the bleed through transparent material to make softer/colored shadows.

PeZiK