On 01/22/2014 05:05 AM, fomhorian wrote:
> I'm getting black lines & patches no matter what. :/
>
> Code:
>
> // +FN16 +BS5 +RP4 +RVP +am3 +a0.1 +r512 +ac0.999995 +w800 +h800

                                        ^---- Yikes!!!!

> // Rendertime 12min 55sek
> // Win 8.1Pro x64 on AMD PhenomII with 8 GB ram
> #version unofficial patch 3.7;
> #patch "upov-reflection-roughness" 0.9;
>
> global_settings{ assumed_gamma 2.2 max_trace_level 36 }
>
> #default{ finish{ ambient 0.1 diffuse 0.7 }}
>
> camera {
>   perspective angle 75 location  <0.0 , 1.0 ,-3.0>  right
> x*image_width/image_height look_at <0.0 , 1.0 , 0.0>
>   aperture 0.025 blur_samples 512,2048 focal_point <0,1.0,0> confidence 0.999
> variance 0.001
> }
>
> light_source{ < 3000,3000,-3000> color rgb 1 }
>
> sky_sphere { pigment { gradient y
>   color_map { [0.00 rgb <0.6,0.7,1.0>][0.35 rgb <0.1,0.3,0.8>][0.65 rgb
> <0.1,0.3,0.8>][1.00 rgb <0.6,0.7,1.0>]}
>   scale 2 }
> }
>
> plane{ <0,1,0>, 0
>         texture{ pigment{ checker color rgb<1,1,1>*1.2 color
> rgb<0.25,0.15,0.1>*0.05 }
>                  normal { bumps 0.75 scale 0.1 turbulence 0.5 omega 0.4 lambda
> 2.5 octaves 6 }
>                  finish { specular 0.1 roughness 0.1 }
>                }
>       }
>
> sphere { <0,0,0>, 1.00
>           texture {
>                     pigment{ color rgb <1,0,0> }
>                     finish { specular 1.0 roughness 0.0125 brilliance 2
> reflection { 0.5 metallic 0.5 roughness 0.0125 } }
>                   }
>
>            scale<1,1,1>  rotate<0,0,0>  translate<0,1.35,0>
>         }  // end of sphere -----------------------------------
>
> I would have liked to paste or attach an image here but...
> I've tried to vary the +r, the +ac & the number of samples that the
> focal blur uses, also the conf & vari, but no success.
> The black patches only exist at the horizon while the lines/dots are
> on the sphere.

I think the expectation that you can overcome the moire' effect of the 
checked plane at the horizon is unrealistic ... I mean +r512 holy moley!

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