Brush
What is it about?
This page covers the Hair Brush tool in Cinema 4D, the most important grooming instrument. It brushes guides interactively in the viewport — with collision against the scalp geometry — to shape hairstyles the way a stylist would.
Brush is without question the most important tool, and works best in the Guide and Point modes.
As the name suggests, this tool brushes the guides (click & drag) interactively in the editor view.