Around probably 2020 I saw a great video, almost certainly YouTube, by a German guy, speaking German, who modeled a curved ramp to an underground garage starting from the car turning space object, drafting the sweeped ramp geometry old-school from the path axis, cross segments every x cm in elevation (I am fairly sure he kept them horizontal, no banking), with the adjoining walls expanding and contracting as required by the turning space, the way these things are in reality. I want to send it to someone to save me a lot of explaining and can't find it. Anybody who saw it and remembers where it is please help.
