The ninth chapter of the Linear Perspective Master Course on NMA by Erik Olson.
Diagram 76: Sketching a Scene and Referencing Ships, a Cliff and a House
Diagram 77: Sketching a Perspective Rough and Considering Variables
Diagram 78: Measuring and Drawing a Bedroom in 2 Point Perspective
Diagram 79: 2 Point Perspective Reference and Perspective 3-D Walk Through