Do you want the same surface to be viewable in both directions?  Or do you want to look one way from one side and another way from the other side?
 
If it is the former, then just turn off backface culling in the attributes.  If you want to do the latter then have have two objects with the vertices wound in opposite directions and then turn backface culling ON.  Since from any one vantage point you will be viewing either the back or front of a triangle, one or the other will always show.  If you don't do it this way there will be z-buffer fighting for the difference surfaces.
 
David Yazel
-----Original Message-----
From: Olivier Tassy [mailto:[EMAIL PROTECTED]]
Sent: Friday, November 16, 2001 10:32 AM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] double sided materials

Hello,
 
I would like to know how to make a "double sided" material in order to view inside my objects when I zoom in.
 
Thanks in advance.
Olivier.

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