Rendering antialiased shadows with depth maps
SIGGRAPH '87 Proceedings of the 14th annual conference on Computer graphics and interactive techniques
IEEE Computer Graphics and Applications
Casting curved shadows on curved surfaces
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
Summed-area tables for texture mapping
SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
I3D '06 Proceedings of the 2006 symposium on Interactive 3D graphics and games
Percentage-closer soft shadows
SIGGRAPH '05 ACM SIGGRAPH 2005 Sketches
Real-time, all-frequency shadows in dynamic scenes
ACM SIGGRAPH 2008 papers
GI '08 Proceedings of graphics interface 2008
ACM SIGGRAPH 2012 Courses
Packet-based hierarchal soft shadow mapping
EGSR'09 Proceedings of the Twentieth Eurographics conference on Rendering
EGSR'07 Proceedings of the 18th Eurographics conference on Rendering Techniques
Real-time soft shadow mapping by backprojection
EGSR'06 Proceedings of the 17th Eurographics conference on Rendering Techniques
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In this paper we present an image-based algorithm to render visually plausible anti-aliased soft shadows in real time. Our technique employs a new shadow pre-filtering method based on an extended exponential shadow mapping theory. The algorithm achieves faithful contact shadows by adopting an optimal approximation to exponential shadow reconstruction function. Benefiting from a novel overflow free summed area table tile grid data structure, numerical stability is guaranteed and error filtering response is avoided. By integrating an adaptive anisotropic filtering method, the proposed algorithm can produce high quality smooth shadows both in large penumbra areas and in high frequency sharp transitions, meanwhile guarantee cheap memory consumption and high performance.