clipka <ano### [at] anonymousorg> wrote:

> Did you use radiosity for those images? If so, can you try again without
> radiosity?
>
> If it appears only when radiosity is enabled, chances are it will be
> fixed with the next release.

Yes, definitely a radiosity issue! But it only seems to appear in conjunction
with an environment map using emission (jpeg, png, hdr, and exr all produce the
artifacts). Here is a simple scene and a few test renders that will hopefully
point you in the right direction for a fix.

//-----------------------------------------------------------------------------
#declare Use_Radiosity = 1;
#declare Use_HDR       = 1;

global_settings {
   #if (Use_Radiosity) radiosity { } #end
   mm_per_unit 10
}

camera {
   location <3.4, 1.6, -1.6>
   look_at  <0, 0, 0>
   right x*image_width/image_height
   angle 60
   rotate y*30
}

light_source { <-250, 10, 0> rgb 8 }

#if (Use_HDR)
   sphere { 0, 10000 hollow inverse
      //pigment { image_map { jpeg "sky3" interpolate 2 map_type 1 }}
      pigment { image_map { exr "probe_beach" interpolate 2 map_type 1 }}
      finish { ambient 0.25 emission 0.25 diffuse 0 }
      no_image
   }
#end

#declare P_SSLT_Apple = pigment { rgb <0.85, 0.84, 0.53> }
#declare F_SSLT_Apple =
   finish { subsurface { <2.29, 2.39, 1.97>, <0.0030, 0.0034, 0.046> } }
#declare T_SSLT_Apple =
   texture { pigment { P_SSLT_Apple } finish { F_SSLT_Apple } }

superellipsoid { <0.1, 0.1> texture { T_SSLT_Apple } }
//-----------------------------------------------------------------------------

Cheers,
Rob
-------------------------------------------------
www.McGregorFineArt.com

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