The fifteenth chapter of the Linear Perspective Master Course on NMA by Erik Olson.
Diagram 119: Constructing a Symmetrical Organic Shape using Reference Planes
Diagram 120: Drawing a Symmetrical Organic Vehicle Shape with Reference Planes
Diagram 121: Creating an Art Deco Type Jute Box using Reference Points and Planes
Diagram 121 (cont.)
Diagram 122: Drawing an Odd Vehicle using Reference Planes plus Various Propellers
Diagram 122 (cont.)
Diagram 123: Constructing Two Intersecting Curved Shapes using Reference Planes
Diagram 124: Finding the Surface Seem connecting two Intersecting Planes
Diagram 125: Drawing Intersecting Planes with an Air Plane, Windows and Curves
Diagram 125 (cont.)