Surfaces always double-sided?

Troubleshooting graphics
1

Are surfaces in jME always double-sided? For example, I import a textured model into jME and go inside the model – I can see the reverse of the outer surfaces from in here.



This leaves me wondering about 2 things:


  1. Is there a particular side of a surface where a surface normal exists? Or do both sides have a surface normal? i.e. does any one side have the "true" surface normal. The only reason I ask is that I'm adding axis rods to everything in my scene graph (in debug mode) so I know what's going on in regards to rotations etc.


  2. Is there any performance hit from this? (presumably not due to backface culling?)
2

In jME you can control with the CullState if Front, Back, Both or No sides should be culled.

I guess usually BackFace culling should be enabled.

3

Aha… thank you.

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