{"action":"created","issue":{"url":"https://api.github.com/repos/openscad/openscad/issues/1591","repository_url":"https://api.github.com/repos/openscad/openscad","labels_url":"https://api.github.com/repos/openscad/openscad/issues/1591/labels{/name}","comments_url":"https://api.github.com/repos/openscad/openscad/issues/1591/comments","events_url":"https://api.github.com/repos/openscad/openscad/issues/1591/events","html_url":"https://github.com/openscad/openscad/issues/1591","id":136835420,"number":1591,"title":"Objects created by difference fail to render or render incorrectly under preview.","user":{"login":"christakahashi","id":1870494,"avatar_url":"https://avatars.githubusercontent.com/u/1870494?v=3","gravatar_id":"","url":"https://api.github.com/users/christakahashi","html_url":"https://github.com/christakahashi","followers_url":"https://api.github.com/users/christakahashi/followers","following_url":"https://api.github.com/users/christakahashi/following{/other_user}","gists_url":"https://api.github.com/users/christakahashi/gists{/gist_id}","starred_url":"https://api.github.com/users/christakahashi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/christakahashi/subscriptions","organizations_url":"https://api.github.com/users/christakahashi/orgs","repos_url":"https://api.github.com/users/christakahashi/repos","events_url":"https://api.github.com/users/christakahashi/events{/privacy}","received_events_url":"https://api.github.com/users/christakahashi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":12,"created_at":"2016-02-26T22:41:47Z","updated_at":"2016-10-03T16:11:02Z","closed_at":null,"body":"Simple program:\r\n\r\n```\r\nin = 25.4;\r\nconn_height = 10;\r\n$fn = 30;\r\n\r\ndifference() {\r\n  cylinder(d=0.5*in,h=conn_height);\r\n  cylinder(d=0.213*in+0.4,h=conn_height+1);\r\n}\r\n```\r\ngenerates the follwing preview/rendered output:\r\n![image](https://cloud.githubusercontent.com/assets/1870494/13367253/f3692e70-dc95-11e5-9746-487347a37b68.png)\r\n\r\n\r\nI've been having similar rendering problems for months now.  I think it may be related to my upgrade to windows 10, but I wasn't paying attention close enough to know for sure.  I'm using version 2015.03-2."},"comment":{"url":"https://api.github.com/repos/openscad/openscad/issues/comments/251149807","html_url":"https://github.com/openscad/openscad/issues/1591#issuecomment-251149807","issue_url":"https://api.github.com/repos/openscad/openscad/issues/1591","id":251149807,"user":{"login":"t-paul","id":1330241,"avatar_url":"https://avatars.githubusercontent.com/u/1330241?v=3","gravatar_id":"","url":"https://api.github.com/users/t-paul","html_url":"https://github.com/t-paul","followers_url":"https://api.github.com/users/t-paul/followers","following_url":"https://api.github.com/users/t-paul/following{/other_user}","gists_url":"https://api.github.com/users/t-paul/gists{/gist_id}","starred_url":"https://api.github.com/users/t-paul/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/t-paul/subscriptions","organizations_url":"https://api.github.com/users/t-paul/orgs","repos_url":"https://api.github.com/users/t-paul/repos","events_url":"https://api.github.com/users/t-paul/events{/privacy}","received_events_url":"https://api.github.com/users/t-paul/received_events","type":"User","site_admin":false},"created_at":"2016-10-03T16:11:02Z","updated_at":"2016-10-03T16:11:02Z","body":"Right, the translation will fix the Z-fighting.\r\n\r\nThe issue screenshots show it's mainly about showing the separate parts depending on the viewing angle instead of the difference it's supposed to show. I can't seem to reproduce that though (Debian/testing, nouveau/mesa-12.0.3, SCS algorithm, both release 2015.03-1 and nightly build 2016.10.01.nightly (git 7e0935d))."}}
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