> Actually those 30% are misleading.  The criteria is if
> Colour_Distance_RGBT() is larger than the aa threshold and
> Colour_Distance_RGBT() calculates the L1 norm of the difference between
> the pixel colors.

Yes, I was thinking this as I read the above replies. This means that useful
values for the threshold are between 0 and 3, or 0 and 4 if alpha output is
on.

 - Slime
 [ http://www.slimeland.com/ ]

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