Hello, I'm having trouble subtracting in many iteration. <http://forum.openscad.org/file/n11862/2.png> This figure is translated 2801 spheres which are used union function. It seems to be right, but when I subtract these spheres from lager one using difference function, unexpected visual error occurs like following figure. <http://forum.openscad.org/file/n11862/1.png> How could I remove these error? -- View this message in context: http://forum.openscad.org/subtraction-visual-error-in-many-iteration-tp11862.html Sent from the OpenSCAD mailing list archive at Nabble.com.

On Mar 3, 2015, at 02:58 AM, heiz8 <interceptor2nd@yahoo.co.jp> wrote: > > How could I remove these error? > Preferences->Advanced->Turn off rendering at NNN elements. This is a safeguard to avoid very slow rendering, as subtracting that many components will be very computationally expensive. -Marius