Bump again. (slow F5 viewing for me too & F6 takes 4m20s, I would not though it so, your code looks OK to me) ----- 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. This work is published globally via the internet. :) 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/ -- View this message in context: http://forum.openscad.org/Preview-updates-slowly-when-rotating-part-with-mouse-tp10305p10337.html Sent from the OpenSCAD mailing list archive at Nabble.com.