I am creating a window with rounded niches.
For this I use a WALLNICHE command for the cutout and a PRISM_ command for the rounded fill body.
Both PRISM_ and WALLNICHE have invisible contour lines at the planned connection points,
but in the finished object there are still lines visible at border from cutout to fill, when I am in the elevation view and in the basic vector 3D window. But these lines shall not be there.
Joachim Suehlo . AC12-26 . MAC OSX 10.15 . WIN10