From what I understood of the code, it looks like media method 3 uses a
fixed AA threshold of 0.2 and completely ignores the value of the
aa_threhold parameter. What did I overlook?

	I'm referring to lines 732 and 768 in media.c in function
sample_media_rec which I believe should be replaced by something like:

DBL aa_threshold=1000; /* or any very big value */
IMEDIA IMedia=*Media_List;
while (IMedia) {
  if (IMedia->AA_Threshold < aa_threshold)
    aa_threshold=IMedia->AA_Threshold;
  IMedia=IMedia->Next_Media;
}
if ( Colour_Distance(C1, C2) > aa_threshold ) /* this is line 732 */
...

	Or maybe, to get faster result, precalculate the threshold and make it
a paramter of sample_media_rec...

		Jerome
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