p.s. A value $fn of 1000 is way over the top for most purposes and extends rendering time. For more complex designs it will grind down really slow. A $fn over 100 is not recommended or only for specific circumstances, and below 50 would be advisable for performance. ----- 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/Changing-Facet-Number-Creates-Invalid-2-Manifold-tp19666p19674.html Sent from the OpenSCAD mailing list archive at Nabble.com.