Anyway to convert Subd to nurbs or stl with sharp edges

I made this star for example in SubD. I want to convert to Nurbs or Stl without losing the sharp edges (pressing alt)
subd star.3dm (123.2 KB)

you mean you want to get the “flat” mode, not “smooth” surfaces ?

and you get the “flat” mode of the sub-D als mesh (so you can export as stl)

will create a Nurbs representation (exact) of the “smooth” mode of your Sub-D

hope that helps -kind regards -tom

thank you, exactly what I meant