Imitative art;, or, The means of representing the pictorial appearances of objects, as governed by aerial and linear perspective: : being a manual of details, for the amateur sketcher and the man of business, with a chapter on finish. (1840)
Howard, Frank, 1805-1866, Darton & Clark, publisher, J. Green and Co., printer · London : Darton and Clark, Holborn Hill. · leaf 62
48 CAST SHADOWS. As the plane of the surface is turned from the right angle with the rays of light, the shape of the shadow becomes distorted, by the increase in … the size of those parts which are more distant from the luminary, if it be small, and more close to it, if it be large.
Drawing · Perspective · Shades and shadows · Surfaces · Drapery in art · Projection
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
