Hi all,
while experimenting with producing an alpha channel in output images I came
across what seems a bug (maybe related to that reported by John David
Haiducek in the thread "Alpha output"):
- text object are not antialiased against the background (they do against
other objects) using alpha output on and method 1
- text object are antialiased oddly against the background using alpha
output on and method 2

Environments:
Pov 3.5beta7, Win2000professional, Dual celeron 400 mhz, 320 Mb RAM
Pov 3.5beta7, Win98SE, PentiumIII 650mhz, 384 Mb RAM

Test scene:

#version 3.5
// try to render with:
// +UA +A0.1 +R3 +FN8
// +UA +A0.1 +AM2 +R3 +FN8

global_settings {
//  assumed_gamma 1.0
 max_trace_level 4
}
background { color rgb <1,1,1> }

// ----------------------------------------
camera {
  orthographic
  location <0,0,1>
  look_at  <0,0,0>
  right 1*x
  up 1*y
}
// ----------------------------------------

box {
  <-0.5, 0, 0>, <0, 0.5, 0>
  texture {
    pigment {
      checker color rgbt <.6,.5,.4,.2> color rgbt <.8,.9,1,.2>
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
 scale .25
  }
}
box {
  <0, 0, 0>, <0.5, 0.5, 0>
  texture {
    pigment {
      checker color rgbf <.6,.5,.4,.2> color rgbf <.8,.9,1,.2>
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
 scale .25
  }
}
box {
  <-0.4, 0.35, -0.1>, <0.4, 0.45, -0.1>
  texture {
    pigment {
      color red 1
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
  }
  rotate 15*z
}
box {
  <-0.4, 0.2, -0.1>, <0.4, 0.3, -0.1>
  texture {
    pigment {
      color green 1
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
  }
  rotate 15*z
}
box {
  <-0.4, 0.05, -0.1>, <0.4, 0.15, -0.1>
  texture {
    pigment {
      color blue 1
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
  }
  rotate 15*z
}
text {
  ttf
  "Arial.ttf",
  "POV-Ray",
  1,
  0
  scale .2
  translate <-.4,-.3,0>
  texture {
    pigment {
      color rgb 0
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
  }
}
text {
  ttf
  "Arial.ttf",
  "POV-Ray",
  1,
  0
  scale .2
  translate <-.2,-.06,0>
  texture {
    pigment {
      color rgb 0
    }
    finish {
      ambient 1.0
      diffuse 0.0
    }
  }
}

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