René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Partially transparent markers with edges are rendered differently by agg, pdf and svg backends.","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\nThe baseline images for the rgba_markers test (rgba_markers.{png,pdf,svg}) clearly show differences in rendering between agg, pdf and svg:\r\n\r\n![rgba_markers](https://user-images.githubusercontent.com/1322974/34086128-4fa9ac6c-e34e-11e7-86e8-240e8206dd78.png)\r\n\r\ntop left is the svg baseline rendered by inkview (inkscape) 0.92.2, top right is the png baseline, bottom left is the pdf baseline rendered by okular 17.08.3, bottom right is the pdf baseline rendered by gs 9.22 (gs is used by the testing framework to rasterize the pdf for image comparisons).\r\n\r\n**Code for reproduction**\r\n\r\nN/A\r\n\r\n**Actual outcome**\r\n\r\nOn the right subplot, whether the central blue disk overlaps with the edge red circle depends on the backend... and, for the case of pdf, also on the renderer (so that part may possibly be a bug in eother okular or gs, but at least svg and png should not be different).\r\n\r\n**Expected outcome**\r\n\r\nAll three backends should render hatching in a similar manner.\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system:\r\n  * Matplotlib version: master\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version:\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2017-12-18T01:20:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/10035/matplotlib/issues/10035"}