AnaMark nous apporta ses lumieres en ce 2005-08-19 04:11:
> White spots appear at the edges of the cutted torus. I use POVray
> 3.6.1.icl8.win32 and Win2k (1GB RAM, 1GHz Pentium). I also tried to install
> 3.6.1a, but it crashes on startup.
> 
> This is my scene file:
> 
> // Commandline options:
> // +W1024 +H768
> 
> 
> camera {
>  location <0, 1, -5.5>
>  look_at <0, 1, 0>
> }
> 
> 
> light_source {<-10, 20, -45> color rgb 1}
> 
> 
> object {
>  intersection {
>   torus { 2 , 0.25 }
>   plane { -x, 0 }
Using 0.01 get rid of the white pixels.
>  }
> 
>  pigment { rgbf 1 }
> 
>  interior {
>   media {
>    absorption 0
>    emission .75
> 
>    density {
>     color rgb <1, .8, .8>
>    }
>   }
>  }
> 
>  hollow
> 
>  rotate <60, -60, 0>
> }
> 
> 
> object {
>  difference
>  {
>   sphere { <0, -9750, 0>, 10000 }
>   sphere { <0, -9750, 0>, 9990 }
>  }
>  pigment { color rgb 1 }
> }
> 
> 
Also, rendering at another size elliminated those white pixels. I think that those are
related to 
presision and rounding errors.

Alain

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