Rigging for Realistic Movement - Game Character Creation with Blender and Unity - page 192

Separate menu and select Selection to separate the head mesh from the rest of the
zombie.
3. Select both eye meshes and the newly separated head mesh. Press Ctrl+J to join the
meshes together.
4. Save your file.
Since both the body and the head meshes are rigged to the armature, they will not
separate when you pose the character. This way, you can treat the head and body as differ-
ent objects and have them call out each other in scripts. This will let you create a headshot
kill in Unity. You are not quite ready for Unity yet, however. In the next chapter, you will
animate the zombie so it can become a believable game enemy.