Hi sgall, Welcome to the forum. Firstly, you should also subscribe to the mailing list, see here <http://forum.openscad.org/mailing_list/MailingListOptions.jtp?forum=1> . Must members just read the mailing list and will only see posts flagged "This post has NOT been accepted by the mailing list yet" in passing. Secondly, your issue. That works OK for me, so it is likely a driver issue, try updating your graphics drivers, also try the Edit/Preference/Advanced "Force Goldfeather' setting. If that fails could you post the info from Help/Library info. ----- Newly minted Admin - PM me if you need anything, or if I've done something stupid... Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above. The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out! -- View this message in context: http://forum.openscad.org/Possible-bug-in-preview-vs-Render-tp14357p14358.html Sent from the OpenSCAD mailing list archive at Nabble.com.