"Tim Attwood" <tim### [at] comcastnet> wrote:

> Triangles are still rendered as triangles, the normal is used to
> make the highlights act different. The solution to this sort of
> thing is to either use more triangles, or switch to isosurfaces.

Thanks for your suggestions, but:
I can not use isosurfaces or increase the number of triangles as they are used
to draw patterns according to parameters
(examples http://www.persistencia.org/bt_tesel.htm )

Thanks anyway
B. Gimeno.

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