Grasshopper surface split

hi i’d like to make some kind of contoured surface

so i made surface by contoured lines and move lines below,and
want to split the surface
but it seems it doesnt work
i used project curve on brep, it doesnt work too
anyone has idea to make that surface?
0525 (55.3 KB)

Extrude surface downward. Use contour -> you will get closed curves.

  1. move curve down. Loft initial curve with moved ones -> vertical surface
  2. Shift initial curves. Merge initial curves with shifted ones. Create boundary surface from both curves -> horizontal surface

BTW don’t create always new threads.

thanks tim i got this one

and ok i’ll update at old one next time