MarkMc, this is awesome and is exactly what I am looking for. I am working with Chief Interiors X9 and have been having trouble creating this on my own. It works just like yours if I create the arc one way (say to the right) and convert to 3d molding polyline. However, when I try to mirror, or create the curve going the other way and then convert to 3d molding polyline (say to the left) the molding profile is backwards, which makes sense I just have no idea how to invert it basically. I don't want to extrude the molding to the interior or exterior on this side, I just want it to face the same way the curve to the right did.
If anyone has any suggestions, or can tell me what step I am missing, I would appreciate it greatly.
Thank you!