The sixteenth chapter of the Linear Perspective Master Course on NMA by Erik Olson.
Diagram 126: A Curved Wedge and Block Intersecting at a Random Angle
Diagram 127: Drawing a Horizontal Cylinder Shape Intersecting a Curved Block
Diagram 128: A Vertical Cylinder Intersecting Through a Curved Plane
Diagram 128 (cont.)
Diagram 129
Diagram 130
Diagram 131: Creating a Blimp, Archway and a Race Car Scene with Reference Planes
Diagram 131 (cont.)