Wasn't it Mike who wrote:
>This scene renders differently depending on whether the parametric is bound
>by a sphere or a box. It should render the same in both instances unless
>I'm overlooking something.

Have you noticed that the shape is the same, it's just the brightness
that's different? If you add "finish {ambient 1}" (and make the sphere
slightly bigger so that it doesn't clip the shape) then the output is
identical.

-- 
Mike Williams
Gentleman of Leisure

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