Gpu pro 3

Ambient occlusion (AO) is a popular technique for visually improving both realtime as well as o ine rendering. It decouples occlusion and shading, providing a gain in e ciency. This results in an average occlusion that modulates the surface shading. However, this also reduces realism due to the lack of directional information. Bent normals were proposed as an amelioration that addresses this issue for o ine rendering. Here, we describe how to compute bent normals as a cheap byproduct of screen-space ambient occlusion (SSAO). Bent cones extend bent normals to further improve realism. These extensions combine the speed and simplicity of AO with physically more plausible lighting.

@InBook { KRES12a,
  author       = "Klehm, Oliver and Ritschel, Tobias and Eisemann, Elmar and Seidel, Hans-Peter",
  title        = "Gpu pro 3",
  chapter      = "Screen-space Bent Cones: A Practical Approach",
  year         = "2012",
  publisher    = "CRC Press",
  type         = "inbook",
  url          = "http://graphics.tudelft.nl/Publications-new/2012/KRES12a"
}