ACM SIGGRAPH ASIA 2009 Courses
Practical filtering for efficient ray-traced directional occlusion
Proceedings of the 2011 SIGGRAPH Asia Conference
Chromatic shadows for improved perception
Proceedings of the ACM SIGGRAPH/Eurographics Symposium on Non-Photorealistic Animation and Rendering
The State of the Art in Interactive Global Illumination
Computer Graphics Forum
ACM SIGGRAPH 2012 Courses
Technical Section: Analytic ambient occlusion using exact from-polygon visibility
Computers and Graphics
Two methods for fast ray-cast ambient occlusion
EGSR'10 Proceedings of the 21st Eurographics conference on Rendering
Obscurance-based volume rendering framework
SPBG'08 Proceedings of the Fifth Eurographics / IEEE VGTC conference on Point-Based Graphics
Improved reconstruction of deforming surfaces by cancelling ambient occlusion
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part I
A multidirectional occlusion shading model for direct volume rendering
EuroVis'10 Proceedings of the 12th Eurographics / IEEE - VGTC conference on Visualization
A directional occlusion shading model for interactive direct volume rendering
EuroVis'09 Proceedings of the 11th Eurographics / IEEE - VGTC conference on Visualization
High resolution sparse voxel DAGs
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
ACM SIGGRAPH 2013 Courses
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This survey deals with obscurances and ambient occlusion. These are relatively cheap techniques that simulate diffuse indirect illumination in a way that looks realistic, though they are not global illumination techniques. The concept of obscurances first appeared in the late 1990s in the context of videogames and a few years later the idea was simplified and used in production rendering of movies under the name of ambient occlusion. In recent years many articles with ideas to improve or accelerate these techniques have appeared, while ambient occlusion has been included in commercial renderers and popularized in videogames and the movie industry. This survey reviews the birth and evolution of obscurances and ambient occlusion techniques in recent years.