Freehand perspective and sketching; principles and methods of expression in the pictorial representation of common objects, interiors, buildings and landscapes (1916)
Norton, Dora Miriam · Brooklyn : The author · leaf 24
. This imaginary transparentplane is called the Picture Plane, and is amost important factor in all freehand draw-ing. Thus, by turning or revolving thepencil on the glass in front of the face,that is, by revolving the pencil in the pictureplane, it can he made to cover the appearance of any… … Fig. 8
Drawing · Perspective
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