problems with contourf & alpha

Pablo Romero <romero619@...32...> writes:

Im having an issue where contourf is producing visible defects in the
shaded contours (within png output) with alpha values that are less
then 1.0.

Looks like the same problem as this one:
http://thread.gmane.org/gmane.comp.python.matplotlib.general/16225

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--
Jouni K. Sepp�nen
http://www.iki.fi/jks