René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"black background on rasterized quadmesh in ps output","articleBody":"This reproduces the problem:\n\n```\nX, Y = meshgrid(linspace(0, 1, 2048), linspace(0, 1, 1024))\nY *= 2 + sin(linspace(0, 2*np.pi, 2048))\nC = np.sin(X + Y)\npcolormesh(X, Y, C, rasterized=True)\ngcf().savefig('test.eps')\ngcf().savefig('test.png')\n```\n\nSaved as eps (converted the eps -\u003e png for upload with inkscape)\n\n![test eps](https://f.cloud.github.com/assets/199813/1232006/4d40daf4-2881-11e3-8a1c-01dce8ee4b64.png)\n\nsaved as png (and matches screen):\n![test](https://f.cloud.github.com/assets/199813/1232007/5d1b6200-2881-11e3-99e3-4530950e9cf3.png)\n\nMy guess is that the agg layer renders the parts of the bounding box around the artist where the quad-mesh isn't as transparent and iirc postscript can't deal with the alpha channel.  I hope this is an easy fix (change the background to (1, 1, 1, 0)?), but I don't know the guts of the rendering layer well enough to tell what to change.\n","author":{"url":"https://github.com/tacaswell","@type":"Person","name":"tacaswell"},"datePublished":"2013-09-28T21:21:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2473/matplotlib/issues/2473"}