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 and shade. The term comes from the Greek σκιά "shadow" and γράφειν graphein, "write".

In architectural drawing, 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.

• Index of optics articles

• Baxandall, Michael (1997). Shadows and Enlightenment. Yale University Press. pp. 84–88. ISBN 0300072724.
• Narang, Meenakshi (2003). Fashion Technology Hand Book. Asia Pacific Business Press. p. 25. ISBN 9788178330976.

• M'Intyre, John H. A. (1901). A Text-book of Sciography: Arranged to Meet the Requirements of Architects and Draughtsmen and of Students Preparing for Advanced Perspective and for the Advanced and Honours Stages of Practical Plane and Solid Geometry. Blackie & Son.