OpenSCAD has trouble with coincident faces. You have to make the one you're subtracting a little longer. On Fri, Oct 7, 2022 at 11:26 AM Bogdan Caramalac via Discuss < discuss@lists.openscad.org> wrote: > > > > ---------- Forwarded message ---------- > From: fxeconomist@yahoo.com > To: discuss@lists.openscad.org > Cc: > Bcc: > Date: Fri, 7 Oct 2022 16:26:14 +0000 > Subject: [OpenSCAD] something upsets me about difference() > > It upsets me for quite a while. > > Whenever I cut something, say with a cylinder, I always need to make it > longer than the cut hole. > > If I don’t, the hole is displayed on screen in a flipping on/off state, > while if I make it longer by one unit, the hole appears integrally cut. > > This creates an induced imprecision in most of the drawings. > > > > ---------- Forwarded message ---------- > From: Bogdan Caramalac via Discuss <discuss@lists.openscad.org> > To: discuss@lists.openscad.org > Cc: fxeconomist@yahoo.com > Bcc: > Date: Fri, 7 Oct 2022 16:26:14 +0000 > Subject: [OpenSCAD] something upsets me about difference() > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >