TF wrote:
> Hello everyone, I'm to the newsgroup. I'm having some troubles with the
> megapov patch. I downloaded it yesterday, and installed it. I'm trying to
> use the isosurfaces so I went to http://www.econym.demon.co.uk/isotut/ to
> learn about them. I took this demo from that site:
> #version unofficial MegaPov 0.7;
> 
> camera { location  <2, 1, -5> look_at <0, 0, 0> angle 60}
> 
> sky_sphere { pigment {
>     gradient y
>     color_map { [0.0 color blue 0.6] [1.0 color rgb 1] }
>   }
> }
> 
> light_source {<-100,200,-100> colour rgb 1}
> 
> 
> #declare R = 2;
> 
> // ----------------------------------------
> 
> isosurface {
>   function { x*x + y +z*z - 1 }
>         accuracy 0.001
>         contained_by{sphere{0,R}}
>         pigment {rgb .9}
>         finish {phong 0.5 phong_size 10}
> }
> 
> sphere {0,R pigment {rgbt <1,0,0,0.9>}}
> 
> But when I run it I get "returned from renderer (non-zero return value)" I
> figured since it was the demo from the site that it should work. Why am I
> getting this error and how can I fix it? Any help would be greatly
> appreciated.
> 
How did you installed megapov patch? I get same error, when I run this 
code in
official POV-Ray version (3.1). You probably started official version. 
What says messages pane? Does it mention megapov (unofficial version, etc)?

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