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 160
), but fromtop to bottom also. If the ball isabove or below the eye therefore,its special picture plane is slantedaccordingly (Fig. 222). In thiscase the picture plane (again/orsuch ohjecfs alone) may be calleda Spherical picture plane. An example of its applicationis the case of a model… … Fig. 223 FREEHAND PERSPECTIVE window beyond that model is drawn on the usual flat pictureplane; that is, with its vertical lines vertical, as always. These distinctions will be found not only necessary, butnatural and easy to make; ^ especially if care is taken to includein the picture space only…
Drawing · Perspective
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