Given this code, I get the following preview/render/stl/print. I thought it might just be a rendering issue, so, I've tracked it at each step including printing, and I'm unsure how to resolve it. Any guidance?
include <../OpenSCAD-Round-Anything/polyround.scad>
$fn=1000;
circle(2);
translate([0, 0, 3])shell2d(-0.5)circle(2);
