Not sure what happened to the beginning of my post.  It started by saying I
was trying to outline a sphere.

sphere {<100, 120, -85>,75 texture {clear_black}}

Sometime ago someone gave me the below trick.

Thanks,
Carl

"Carl" <car### [at] semisouthcom> wrote:
> The trick I was given was this:
>
> sphere {<100,120,-85>,85 texture {pigment {rgbt 1}} interior_texture
> {red_frame}}
>
> Its what you see in the top left here:
>
> http://www.wwwmwww.com/TRON/Outline.png
>
> I soon learned I had to use the no_shadow flag to get what I wanted however.
> And it wasn't till reciently I noticed something else was missing.  The
> reflection of the grid lines are gone from the black sphere.  To get these
> back I need to use the no_reflection flag as well.  However when I do that
> I lose the outline of my black sphere as seen in any reflection.
>
> Ideally what I'd like to do is to say the larger r=85 sphere doesn't cast a
> shadow or is seen in any reflection inside it however it does cast a shadow
> and leaves reflections outside it.
>
> Is there any way to do that?
>
> Thanks,
> Carl

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