Screen space anisotropic blurred soft shadows

  • Authors:

  • Zhongxiang Zheng;Suguru Saito

  • Affiliations:

  • Tokyo Institute of Technology;Tokyo Institute of Technology

  • Venue:
  • ACM SIGGRAPH 2011 Posters
  • Year:
  • 2011

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Abstract

Generating soft shadows by area light sources is important for rendering a realistic scene in computer graphics. One of the methods for real time rendering of soft shadows is Screen-space percentage-closer soft shadows(SSPCSS)[MohammadBagher et al. 2010] which improved the performance of PCSS[Fernando 2005] when the light source is large, by using separable Gaussian filtering in screen space. However, SSPCSS does not consider the angle between a normal vector of a shadowed surface and a viewing vector. Therefore, it causes different soft shadows by viewpoints. Our algorithm solves this problem by using anisotropic Gaussian blurs which depend on the normal vectors of the surfaces (Fig. 1).