In article <403ccb81$1@news.povray.org> , Christophe Raffalli 
<raf### [at] univ-savoiefr>  wrote:

> I read the manual about interior texture. It says that it can be apply
> to triangle (and I assume mesh and mesh2) but I did not find (with a
> grep) the definition of backside and frontside for triangles, mesh and
> mesh2 ?
>
> Moreover, the definition seems to differ from OpenGL's (order of
> vertices) and seems not to use normals either when they are given so I
> can not guess it !
>
> Please help.

You cannot currently recreate the OpenGL backface cullling effect with
POV-Ray.  This effect only exists in OpenGL as a speed optimisation because
for OpenGL it is faster to not render backfacing triangles.  This is not the
case in POV-Ray.

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

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