Making a viking helmet is quite an easy achievement to accomplish. The viking helmet is made with one primitive and one spline. The one primitive used is not a sphere, but a modified cube. The modifiers used are spherify and symmetry. The spherify modifier is used instead of an actual sphere primitive because the sphere primitive is actually made with Triangles and squares, but it is reportedly easier to only use a "sphere" made of squares. The bottom portion of the viking helmet is then deleted as the i
References
“Modeling a Helmet Using the Ribbon.” Modeling a Helmet Using the Ribbon, Autodesk Knowledge Network, 28 Aug. 2017, knowledge.autodesk.com/support/3ds-max/getting-started/caas/CloudHelp/cloudhelp/2018/ENU/3DSMax-Tutorial/files/GUID-A8AFC8F7-AC83-428C-A9FC-A103CBE5F000-htm.html.