One suggested improvement..... on my screen, some of the line segments on some of the items, vary in thickness by a pixel ( a section looks thicker than the rest). You can take advantage of the bezier smoothing of the curves ( all lines in Zinc are just straight curves ), by adding smoothrelief
$current = $zinc->add(
'curve', 1, [@points],
-closed => 1,
-visible => 1,
-filled => 1,
-fillcolor => $color,
-smoothrelief => 1 # add this
);
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