Here's another scene that shows a side-effect of the problem (or
whatever it is) I mentioned in the previous post:

camera { location -5*z look_at 0 }
plane { -z,-10 pigment {color rgb 1} finish {ambient 1}}

box {
  <-1,-1,-.01>, <1,0,.01>

  texture {  
    gradient x 
    texture_map {
      [0 pigment {color rgbt <1,0,0,1>}finish {ambient 1}]
      [1 pigment {color rgbt <0,1,0,0>}finish {ambient 1}]
    }
  }
}      

box {
  <-1,0,-.01>, <1,1,.01>
  texture {  
    pigment {
      gradient x 
      pigment_map {
        [0 color rgbt <1,0,0,1>]
        [1 color rgbt <0,1,0,0>]
      }
    }
    finish {ambient 1}
  }
}      

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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