Why would one use splines for that? In OpenScad just a few lines: $fn = 50; minkowski() { sphere(5); cube([20, 30, 10]); } -- View this message in context: http://forum.openscad.org/pyopenscad-spline-based-curved-box-function-tp16353p16355.html Sent from the OpenSCAD mailing list archive at Nabble.com.