“Parallax searching and mesosurface shadowing” by Delgass and McGhee
Conference:
Type(s):
Title:
- Parallax searching and mesosurface shadowing
Presenter(s)/Author(s):
Abstract:
Fine surface details and shadows are important visual cues for discerning relative object positions and surface contours of shadow receivers. Per-pixel displacement techniques have been presented which extend the bump mapping [Blinn 1978] mesosurface rendering technique. Parallax effects and self-occlusions have been achieved by adjusting albedo and normal map texture coordinates to account for the view direction [Policarpo et al. 2005; Donnelly 2005]. However, uncorrected application of the shadow mapping algorithm [Williams 1978] to these techniques results in flat shadows that do not conform to the shape of the displaced surface.
References:
1. Blinn, J. F. 1978. Simulation of wrinkled surfaces. Computer Graphics (Proceedings of ACM SIGGRAPH 78) 12, 3, 286–292.]]
2. Donnelly, W. 2005. GPU Gems 2: Programming Techniques for High-Performance Graphics and General-Purpose Computation. Addison-Wesley, Boston, MA, ch. Per-pixel displacement mapping with distance functions, 123–136.]]
3. Kaneko, T., Takahei, T., Inami, M., Kawakami, N., Yanagida, Y., Maeda, T., and Tachi, S. 2001. Detailed shape representation with parallax mapping. In Proceedings of ICAT 2001, 205–208.]]
4. Policarpo, F., Oliveira, M. M., and Comba, J. L. D. 2005. Real-time relief mapping on arbitrary polygonal surfaces. In Proceedings of SI3D 2005, ACM, New York, NY, 155–162.]]
5. Williams, L. 1978. Casting curved shadows on curved surfaces. Computer Graphics (Proceedings of ACM SIGGRAPH 78) 12, 3, 270–274.]]
