I don’t know if this makes sense. I will try my best to explain.
in rhino4 if I use the rail revolve using those curves with history on and move the section curve the surface becomes editable like the picture above. I attached the file which was saved in rhino4. if you rail revolve and history “on” and move the section curve and turn on the points the surface becomes a closed surface but editable.
but in rhino 5 this doesn’t work. is it possible to make the same one in rhino5??