How to cull inner triangle on mobile platform


I want to use the translucent material in my project. But I can’t cull the inner triangle. I have found Tom Looman’s solution which is based on custom depth. But this method doesn’t work on mobile platform. I can’t set and get custom depth on mobile platform.

Is there any other way to cull inner triangle? Or I have to modify the code of Engine to do this?

Thank you very mush.