Re: [matplotlib-devel] Quadmesh with alpha without the nasty edge effects

[Michael D. <md...@st...>]

Yeah -- I think it's a known bug (though not sure if it's in the tracker).

The solution is probably to do something like the compound path 
rendering you (Phil) have experimented with, or, perhaps more easily, 
rendering without alpha to a temporary image buffer and then compositing 
it with alpha in a single step.

Mike

On 05/13/2013 10:14 AM, Benjamin Root wrote:
>
>
>
> On Mon, May 13, 2013 at 9:58 AM, Phil Elson <pel...@gm... 
> <mailto:pel...@gm...>> wrote:
>
>     I can't work out if I'm having a brain block or it really can't be
>     done, but I'm trying to produce a pcolormesh with alpha without
>     the nasty edges seen in the attached image
>
>
> The issue is that the quads are overlapping just slightly.  Any 
> solution to this has to be to make them not overlap at all.  This is 
> an old problem, to be sure.
>
> Ben Root
>
>
>
>
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