Save nrrd as stl but only the outside

Hi! I want to save a .nrrd file as a stl, but i want only the superficial mesh. I need the skin to make a 3d orthosis.


STL file can only store a surface mesh. If your problem is that the extracted skin surface segment is not solid then either use Smoothing effect or Wrap Solidify effect (provided by SurfaceWrapSolidify extension).