Freestyle > Adding Detail to the Control Mesh > Joining Mesh Elements > Example: Joining Mesh Elements
  
Example: Joining Mesh Elements
Original Shape
Joined Shape
Joining two faces highlighted in green
Joining two edges highlighted in green
Joining connected edges highlighted in green
Joining connected faces highlighted in green
Joining edge chains highlighted in green
Joining face chains highlighted in green
Joining surfaces of two shapes highlighted in green
Joining or converging two vertices highlighted in green
Joining or converging a face highlighted in green
Joining or converging an edge highlighted in green