Sciography, also spelled sciagraphy or skiagraphy, is a branch of the science of perspective dealing with the projection of shadows, or the delineation of an object in perspective with its gradations of

light Light, visible light, or visible radiation is electromagnetic radiation that can be visual perception, perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400– ...

and

shade Shade, Shades or Shading may refer to: * Shade (color), a mixture of a color with black (often generalized as any variety of a color) * Shade (shadow), the blocking of sunlight * Shades or sunglasses * Shading, a process used in art and graphic ...

. The term comes from the Greek "shadow" and , "write". In

architectural drawing An architectural drawing or architect's drawing is a technical drawing of a building (or building project) that falls within the definition of architecture. Architectural drawings are used by architects and others for a number of purposes: to deve ...

, sciography is the study of shades and shadows cast by simple architectural forms on plane surfaces. In general sciography, the light source is imagined as the sun inclined at 45 degrees to both vertical plane and horizontal plane coming from left hand side. The resultant shadow is then drawn.

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* Technical drawing Architecture {{Architecture-stub

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