Hi,

   I've been trying to add a checkered plane to an image. The plane itself can
be generated with a POV-Ray file comprising:

camera {
   perspective
   location <15, -12, 72>
   look_at <-1,3,35>
   sky <1,-1,0>
   }
light_source {
   <50, -20, 35>, color rgb<1.000,1.000,1.000>
   parallel
   point_at <0,0,20>
   }
plane { <1,-1,-0.1>, -30
   pigment { checker rgb<0.8, 0.8, 1.0>, rgb<1.0, 1.0, 1.0> scale 20}
   }

With POV-Ray 3.6.2 under Windows XP (Mac Parallels VM), I see overlapping lines
of checkers that look like they're going to different perspective points (sorry
I can't attach a file here, please let me know an e-mail address and I'll be
happy to send along a PNG of what I see). I was expecting a simple checkered
plane rather than two overlapping ones. What am I doing wrong here?

Thanks for any help!

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