Hello,

I use POV-Ray 3.7RC4 on Windows.
I made a simple scene

// from here
#version 3.7;
#include "colors.inc"
global_settings {
  assumed_gamma 1.0
  max_trace_level 12
}
camera {
  angle 35
  location <0,1.4,-6>
  look_at <0,0.8,0>
}
light_source {
  <-2,10,-20>
  White
}
plane {
  y, 0
  pigment { Gray10 }
}
// to here

and rendered with [640x480, No AA] preset.

This is screenshot of render window.
http://blogimg.goo.ne.jp/user_image/69/3c/83e31ff151644d9a6a6c3f89583d54e9.png

And this is the output file.
http://blogimg.goo.ne.jp/user_image/57/ce/dcf2d63a98a4e0f8fd0c682d3d90b290.png

The output gets color bands that haven't been in render window.
3.7RC3 makes bands too.

How could I get output that is equal to render window?
Advice appreciated.
Thank you very much.

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