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"Mike Sobers" <sob### [at] mindspring com> schreef in bericht
news:web.47e84046f97379de22cf3300@news.povray.org...
>
> And here's one the same (no photons, no radiosity, no media) with
> max_gradient
> dropped to 10 (as opposed to 60 previously). The maximum gradient
> reported
> was 52.950. The problem is worse with lower max_gradient, but appears to
> be of
> similar form. Shouldn't setting max_gradient higher than the maximum
> gradient
> of the function fix the problem?
>
With max_gradient 100 the artefacts disappear completely. Now, the minimum
max_gradient should be easily found (somewhere between 60 and 100).
Thomas
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