Posted by gouessej on Jul 27, 2015; 11:27pm
URL: https://forum.jogamp.org/Manually-set-normal-vectors-are-ignored-for-backface-culling-tp4034976p4034980.html

The normals are used for the lightning, not for the backface culling. It depends rather on the winding, the order of the vertices. Actually, understanding Java based scenegraphs is easier with a strong knowledge of computer graphics and OpenGL when you really want to understand what happens behind the hood. I understand that it can be a bit frustrating.