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"Bill Pragnell" <bil### [at] hotmail com> schreef in bericht
news:web.4362127eca18a3ea731f01d10@news.povray.org...
> Right, just to illustrate this suspected precision glitch, here's 7 images
> of a simplified Ringworld (please excuse the crudity of the composite).
>
> The Ring is a hollow open cylinder 1 million units tall and 90 million
units
> in radius, with a light at the centre. I've translated it by 90 million y
> so that the origin lies on the Ring surface with the x axis at a tangent.
>
> The first three images are, left to right, a camera y = 100, 10, 1.
> The middle image is camera y = 0.
> The final three images are, left to right, a camera y = -1, -10, -100.
>
> Firstly, Thomas, do you see the same thing with your Ring?
> Secondly, can anyone clarify what exactly is happening here? Is it a
> precision problem, or something else?
>
Yes, Bill. The same happens with my Ring. If I lower my camera towards the
surface I get exactly the same artifacts.
Thomas
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