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Some applications require scenes mixing polygonal and volumetric objects and shadows make the scenes more realistic. This paper describes a shadow algorithm for mixed polygonal and volumetric data, including the generation of soft shadows for area light sources. Our volume shader leverages advanced graphics GPU for an accelerated and feasible solution. The shadow and soft shadow algorithm applies to all combinations of volumes and polygons, without any restriction on the geometric positioningdoi:10.1109/cgi.2005.1500434 dblp:conf/cgi/ZhangXC05 fatcat:5ao64abuqnf6tlc6emjc2tmcla