Reference head models.
ztl and obj files included.
polygons,
head01
3,469,000_zbrush
346,920_decimated obj
head02
2,173,000_zbrush
260,860_decimated obj
head03
5,950,000_zbrush
611,485_decimated obj
head04
5,639,000_zbrush
563,930_decimated obj