Please help with blenderchar eyes

I took an existing model i found around the net and decided to add those nice pixar style eyes as depicted in the blenderchar site. My problem is that even though i followed all the values for the cornea material i get this nasty effect of the cornea rendering even if it’s overlaped by another object even when i render a view from the back of the character.

Is there any way to get rid of that?

Thanks in advance


Please disregard, I found WeirdHat on irc and he explained what was wrong
the ZOffs value should be 0, otherwise the transparent material renders over others.