Freehand perspective and sketching; principles and methods of expression in the pictorial representation of common objects, interiors, buildings and landscapes (1910)
Norton, Dora Miriam · Brooklyn : D. M. Norton · leaf 163
FREEHAND PERSPECTIVE … Fig. 2^29 We next observe (in Fig. 228) that the vertical vase castsa vertical shadow on the vertical back of the box. Then werecall that the horizontal edges BE and DGr cast on horizontal surfaces horizontalshadow edges i-e anddr-g. As these edgesvanish, their shadowsvanish with them tothe same…
Drawing
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![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-179-430.webp)
