Abstract
This paper introduces a novel approach in the rendering of high-quality shadows in real-time. The contemporary approach to shadow rendering in real-time is shadow maps algorithm. The standard shadow maps suffer from discretization and aliasing due to the limited resolution of the shadow texture. Moreover, omnidirectional lights need additional treatment to work correctly (e.g. with dual-paraboloid shadow maps). We propose a new technique that significantly reduces the aliasing problem and works correctly for various kinds of light sources. Our technique adapts the light’s field-of-view to the visible part of the scene and thus stores only the relevant part of the scene to the full resolution of the shadow map. It produces high-quality shadows which are not constrained by position or type of the light sources and also works in fully dynamic scenes. This paper describes the new approach, presents some results, and discusses the potential, features and future of the approach.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Crow, F.C.: Shadow algorithms for computer graphics. SIGGRAPH Comput. Graph. 11, 242–248 (1977)
Williams, L.: Casting curved shadows on curved surfaces. SIGGRAPH Comput. Graph. 12, 270–274 (1978)
Brabec, S., Annen, T., Seidel, H.P.: Shadow mapping for hemispherical and omnidirectional light sources. In: Proceedings of Computer Graphics International, pp. 397–408 (2002)
Osman, B., Bukowski, M., McEvoy, C.: Practical implementation of dual paraboloid shadow maps. In: Proceedings of the 2006 ACM SIGGRAPH Symposium on Videogames, pp. 103–106. ACM, New York (2006)
Stich, M., Wächter, C., Keller, A.: Efficient and Robust Shadow Volumes Using Hierarchical Occlusion Culling and Geometry Shaders. In: GPU Gems 3. Addison-Wesley Professional, Reading (2007)
Fernando, R., Fernandez, S., Bala, K., Greenberg, D.P.: Adaptive shadow maps. In: Proceedings of the 28th Annual Conference on Computer Graphics and Interactive Technique, pp. 387–390. ACM, New York (2001)
Stamminger, M., Drettakis, G.: Perspective shadow maps. In: Proceedings of the 29th Annual Conference on Computer Graphics and Interactive Techniques, pp. 557–562. ACM, New York (2002)
Wimmer, M., Scherzer, D., Purgathofer, W.: Light space perspective shadow maps. In: The Eurographics Symposium on Rendering (2004)
Zhang, F., Sun, H., Xu, L., Lun, L.K.: Parallel-split shadow maps for large-scale virtual environments. In: Proceedings of the 2006 ACM International Conference on Virtual Reality Continuum and its Applications, pp. 311–318. ACM, New York (2006)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Vanek, J., Navrátil, J., Herout, A., Zemčík, P. (2011). High-Quality Shadows with Improved Paraboloid Mapping. In: Bebis, G., et al. Advances in Visual Computing. ISVC 2011. Lecture Notes in Computer Science, vol 6938. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24028-7_39
Download citation
DOI: https://doi.org/10.1007/978-3-642-24028-7_39
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-24027-0
Online ISBN: 978-3-642-24028-7
eBook Packages: Computer ScienceComputer Science (R0)