Perspective 11: Formally Measuring Degrees of Slopes (NMA)
The eleventh chapter of the Linear Perspective Master Course on NMA by Erik Olson.
Diagram 98: Using a ML, MP and the Picture Plane to Measure Sloped Behavior
Diagram 98a: Gridded Slope by Using PP, ML and MP, or Using a Reference Method
Diagram 99: Measuring Slope Angles and Figure/Object Behavior on Slopes
Diagram 100: Measuring and Using 45 Degree Auxiliary VP's to Create Cubes