In this lesson, you create a visor using the front side of the helmet as a starting mold. This visor is modeled as a separate object and reattached to the helmet at the end.
Create the visor:
This new line serves as path for the visor.
This duplicates your selection as a separate object.
Define the visor:
You can now edit the visor without accidently selecting the character's head or helmet.
The helmet integrates the visor's geometry as a distinct element. Note that he Symmetry modifier automatically mirrored the visor half.