Shades and shadows, with applications to architectural details, and exercises in drawing them with the brush and pen .. (1912)
Ware, William R. (William Robert), 1832-1915 · Scranton, International Textbook Company · leaf 50
then to draw two lines of shadow from this point tangent to the perimeter of the base (Fig 35 A)The faces included between these two hnes will be in shade. If the shadow of the vertex falls within +L K=ias at B, all the faces are in light; if it falls just upon the outline of the base as at S orZTl…
Shades and shadows
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