Soft shadows for cinematic lighting for computer graphics

Details Soft shadows for cinematic lighting for computer graphics Soft shadows for cinematic lighting for computer graphics

G - Physics

06

T

G06T 15/60 (2006.01) G06T 15/70 (2006.01)

Patent

CA 2618127

A method and apparatus for high quality soft shadows for area lights in cinematic lighting for use in computer graphics, such as computer enabled animation. The method is an extension of traditional shadow maps, so it has the advantage of image based shadow methods; the complexity of the present method is independent of geometric complexity. It uses multilayer translucent shadow maps, which can be used to produce high quality soft shadows for scenes with extremely complex geometry, fur, and volume objects. Instead of the traditional sampling and filtering of shadow maps, the present method computes the shadow factor by ray tracing the multilayer translucent shadow map. The result is soft edged shadows of quality similar to that achieved by conventional stochastic ray tracing, but at much lower computational cost.

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