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 169
l. On the vertical wall, the shadowof the vertical OH is also vertical. It is ended by the light-rayfrom 0 through Gr. The shadow of the edge GrI will be parallelto it, and like it will appear as a vanishing line to VPl. Thenear part (d-j) of the shadow of DI will be parallel to DI, andwill vanish… … SHADOWS extends in an almost opposite direction from that of the chair.These shadows are produced by the diffused daylight radiatingfrom the window. On the other hand a patch of sunlight fallingthrough the window would follow the laws of sunlight generally.The edges a-b and c-d vanish with AB and…
Drawing
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