>What's "filleting"? Make hard edges soft by replacing them with a surface whose cross-section by the plane normal to the hard edge is a circle tangent to the

>What's "filleting"? Make hard edges soft by replacing them with a surface whose cross-section by the plane normal to the hard edge is a circle tangent to the the two surfaces connected by the edge. Somewhat easy when hard edges are simple straight lines connecting planes, but trickier when multiple hard edges meet at a vertex at arbitrary 3D angles or when the hard edge is a 3D curve.