Modern perspective: a treatise upon the principles and practice of plane and cylindrical perspective (1900)
Ware, William R. (William Robert), 1832-1915 · New York, The Macmillan company; London, Macmillan & co., ltd. · leaf 46
Fig. 1. 20. Lines parallel to the picture-plane, whatever their direction, have their perspectives drawn Lines parallel to the pic-parallel to tliemselves; that is, in their real ture. direction. The magnitude of the perspective of anysuch line is less than that of the real line, accordingas the…
Perspective · Shades and shadows
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-122-336.webp)
