Hardware accelerated ambient occlusion techniques on GPUs
Proceedings of the 2007 symposium on Interactive 3D graphics and games
ACM SIGGRAPH 2007 courses
Image-space horizon-based ambient occlusion
ACM SIGGRAPH 2008 talks
Multi-layer dual-resolution screen-space ambient occlusion
SIGGRAPH 2009: Talks
Proceedings of the 2010 ACM SIGGRAPH symposium on Interactive 3D Graphics and Games
Proceedings of the Conference on High Performance Graphics
The alchemy screen-space ambient obscurance algorithm
Proceedings of the ACM SIGGRAPH Symposium on High Performance Graphics
Efficient screen-space approach to high-quality multiscale ambient occlusion
The Visual Computer: International Journal of Computer Graphics
The State of the Art in Interactive Global Illumination
Computer Graphics Forum
Fast soft self-shadowing on dynamic height fields
EGSR'08 Proceedings of the Nineteenth Eurographics conference on Rendering
Two methods for fast ray-cast ambient occlusion
EGSR'10 Proceedings of the 21st Eurographics conference on Rendering
EGGH-HPG'12 Proceedings of the Fourth ACM SIGGRAPH / Eurographics conference on High-Performance Graphics
Multi-view ambient occlusion with importance sampling
Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
| Hi-index | 0.00 |
Ambient obscurance (AO) is an effective approximation of global illumination, and its screen-space (SSAO) versions that operate on depth buffers only are widely used in real-time applications. We present an SSAO method that allows the obscurance effect to be determined from the entire depth buffer for each pixel. Our contribution is two-fold: Firstly, we build an obscurance estimator that accurately converges to ray traced reference results on the same screen-space geometry. Secondly, we generate an intermediate representation of the depth field which, when sampled, gives local peaks of the geometry from the point of view of the receiver. Only a small number of such samples are required to capture AO effects without undersampling artefacts that plague previous methods. Our method is unaffected by the radius of the AO effect or by the complexity of the falloff function and produces results within a few percent of a ray traced screen-space reference at constant real-time frame rates.