Lights from highlights and shadows
I3D '92 Proceedings of the 1992 symposium on Interactive 3D graphics
Numerical recipes in C (2nd ed.): the art of scientific computing
Numerical recipes in C (2nd ed.): the art of scientific computing
Radioptimization: goal based rendering
SIGGRAPH '93 Proceedings of the 20th annual conference on Computer graphics and interactive techniques
Lighting controls for computer cinematography
Journal of Graphics Tools
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Shadow algorithms for computer graphics
SIGGRAPH '77 Proceedings of the 4th annual conference on Computer graphics and interactive techniques
A user interface for interactive cinematic shadow design
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
Maximum entropy light source placement
Proceedings of the conference on Visualization '02
Casting curved shadows on curved surfaces
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
Interactive modeling of topologically complex geometric detail
ACM SIGGRAPH 2004 Papers
Lpics: a hybrid hardware-accelerated relighting engine for computer cinematography
ACM SIGGRAPH 2005 Papers
IEEE Transactions on Visualization and Computer Graphics
3D unsharp masking for scene coherent enhancement
ACM SIGGRAPH 2008 papers
3D-aware image editing for out of bounds photography
Proceedings of Graphics Interface 2009
Directable anime-like shadow based on water mapping filter
SIGGRAPH '09: Posters
Cartoon Animation Style Rendering of Water
ISVC '09 Proceedings of the 5th International Symposium on Advances in Visual Computing: Part I
ACM SIGGRAPH ASIA 2009 Courses
Interactive on-surface signal deformation
ACM SIGGRAPH 2010 papers
Postmortem stylization of open-source games
I3D '12 Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
Learning about shadows from artists
Computational Aesthetics'10 Proceedings of the Sixth international conference on Computational Aesthetics in Graphics, Visualization and Imaging
Visibility editing for all-frequency shadow design
EGSR'10 Proceedings of the 21st Eurographics conference on Rendering
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While much research has focused on rendering physically-correct shadows, a "correct" shadow often exhibits unnecessary detail that distracts from the primary subject of the scene. Artists often prefer to have creative control over the rendered appearance of the shadow. This paper presents an algorithm offering control over stylized shadows, based on four intuitive parameters - inflation, brightness, softness, and abstraction - that together support a broad range of effects. The algorithm, which works largely in image space, can easily be incorporated into existing rendering pipelines, and is independent of scene geometry or shadow determination method.