I think what you are seeing is a result of JPEG compression artifacts.
Though I could be wrong.

Steve wrote:

> Peter
>
> Beautiful image, but I wouldn't like it to determin the colours
> of my future bathroom.
>
> There seems to be a normal close to the holes, how do you do
> that, withaout the normal affecting the middle, parts of the
> flat/plane space in the image.
>
> Really nice Peter
> It'll keep us on our toes a always.#
>
> Cheers
> Steve
>
> Peter Popov wrote:
> >
> > Level 2 Fractal Cheese (see p.b.scene-files and povray.advanced-users)
> >
> > ---------
> > Peter Popov
> > ICQ: 15002700
> >
> >  [Image]

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