Le 04/04/2015 04:35, Alain a écrit :
> Le 15-04-03 09:25, And a écrit :
>> When I rendered this file, I got this:
>>
http://news.povray.org/povray.binaries.images/thread/%3Cweb.551e92b74514bfb213709ea20%40news.povray.org%3E/
>>
>>
>>
>>
>> And here is a discussion several days ago, which may be a similar
>> phenomenon.
>>
http://news.povray.org/povray.bugreports/thread/%3Cweb.5517c69b250fa02e5189b500%40news.povray.org%3E/
>>
>>
> 
> It looks like it could be a precision/accuracy isue as multiplying the
> dimentions by 50 makes the artefact disapear. You may hit the limits of
> double precision FP numbers.
> 
> Scaling up, even by 1000, DON'T improve the end result. In fact, when
> scalling up, I get a full black circle, not just parts of it.
> 
> 
> 
> Alain

I just scaled it by 10 and it went away:

    torus{
    -0.1247, 0.2357
    rotate <-90,0,0>
    scale 1/10
    }

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