Hello List, if i write: union()    {      circle(5/2);      translate([0,0,7])square([8.5,4], true);    } i see 2 objects now i want the hull of this hull()    {      circle(5/2);      translate([0,0,7])square([8.5,4], true);    } And the z-translation of the square is gone. How is it possible to get this done so i get a correct 3D-object ? best regards Corpsman

To produce a 3D object you need to hull 3D objects. Hulling 2D objects only produces a 2D result and there are no Z coordinates. eps = 1/128; hull() { cylinder(r = 5/2, h = eps); translate([0,0, 7 - eps])cube([8.5,4, eps], true); } There is no technical reason why you can't hull 2D objects in 3D but OpenSCAD doesn't allow it. On Mon, 24 Dec 2018 at 11:20, corpsman <corpsman@corpsman.de> wrote: > Hello List, > > if i write: > > union() > { > circle(5/2); > translate([0,0,7])square([8.5,4], true); > } > > > i see 2 objects now i want the hull of this > > hull() > { > circle(5/2); > translate([0,0,7])square([8.5,4], true); > } > > > And the z-translation of the square is gone. How is it possible to get > this done so i get a correct 3D-object ? > > > best regards > > > Corpsman > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >