> Your example works fine, just turn the ambient light down to nothing
> (0.0,0.0,0.0) and then set the directional light to point straight into
> the scene - I tried (0.0,0.0,-1.0).
>
> I think part of the problem is that the tetrahedron is tilted at an odd
> angle and so your light wasn't hitting much of each face - plus the fact
> that the ambient light was making things look a murky gray.
>
My problem is to have lighting enabled AND to see the colors defined in the
geometry array at the same time ...
When the tetrahedron's faces are blue, yellow and red (colors defined in the
geometry),
the lighting is NOT enabled ...
When I set an appearance with material, I loose the colors (red, yellow, blue)
defined in the geometry ...
Fred
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