E8 AutoCAD 2021 - 3D Lofted Boat Hull

[@Thestripper1]

19:53 You can't Unroll or flatten a surface that has a double curvature. Command smash will do something but it will be unprecise. If you want to flatten a hull it has to be a hard chined hull with equal ammount of segments in each section.

[@vertanux1]

Thank you. I often wondered why when I used the Rhino3D flatten tool it sometimes worked and sometimes didn't.