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Posted: 2006-10-02T21:25:51-07:00
by magick
You are drawing an opaque white arc. Instead you want to use a fill color that includes some degree of transparency.

Posted: 2006-10-02T21:35:15-07:00
by magick
See http://www.cit.gu.edu.au/~anthony/graphics/imagick6 for examples of using transparent fill colors.

Posted: 2006-10-03T08:44:17-07:00
by anthony
Sepecifically Look in 'Channels and Masks'. Yes it is an odd place, but I haven't found a better spot at this time.