On the philosophy of painting: a theoretical and practical treatise.. (1849)
Twining, Henry · London, Longman, Brown, Green, and Longmans · leaf 448
wisting of the shadow, resulting from a less degree of dif-ference in the relations of the two planes. The board E,and the wall, being upright, both surfaces are here parallelwith regard to one of their extensions. In this case,the projected shadow becomes irregular or deformed,only when the rays… … though lengthened or shortened, would remain regularwith any horizontal inclination of the rays, if unac-companied by a vertical inclination; because the hori-zontal inclination affects those sides only of the object, 398 PROJECTED SHADOWS. which are parallel to the surface on which the shadowis…
Painting · Aesthetics · Perspective
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