Alf Peake wrote:
> 
> (Was originaly posted in p.prog)
> I was having another try at smoothly joining 2 different sized pipes or tubes
> at rightangles when I hit this problem - one tube developed large holes in it.
> Open or closed cylinders made no difference but they do change with camera
> angle or RadW. I used DOS versions of mpov 0.4 and pov 3.1g.
> 
> Any ideas where the problem is please?
> 

I have no idea of what causes this error, but I
have included a file below that produces similar 
errors in my POV-Ray v3.1g for Windows 98.

The spheres are "shining" through the cylinder 
when there are many of them in a "sweep" behind it.

Tor Olav

--
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html


#version 3.1;

light_source {
  100*<2, 3, -2>
  color 2*<1, 1, 1>
}

camera {
  location <3, 2, -3>/2
//  location <3, 0, 0> // To see posistion of spheres
  look_at <0.5, 0, 0>
}

#declare NrOfSpheres = 200; // Also try 100 and 250

#declare Cnt = 0;

difference {
  union {
    cylinder {
      <0, 0, 0>, <1, 0, 0>, 0.5
      pigment { color <0, 1, 0> }
    }
    #while (Cnt < NrOfSpheres)
      sphere {
        (0.5 - Cnt/NrOfSpheres)*y + z, 0.1
        pigment { color <1, 0, 0> }
      }
      #declare Cnt = Cnt + 1;
    #end    
  }
  sphere { 
    <1, 0, 0>, 0.2
    pigment { color <0, 0, 1> }
  }
}

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