“Combining global and local virtual lights for detailed glossy illumination”
Conference:
Type(s):
Title:
- Combining global and local virtual lights for detailed glossy illumination
Session/Category Title: Rendering
Presenter(s)/Author(s):
Moderator(s):
Abstract:
Accurately rendering glossy materials in design applications, where previewing and interactivity are important, remains a major challenge. While many fast global illumination solutions have been proposed, all of them work under limiting assumptions on the materials and lighting in the scene. In the presence of many glossy (directionally scattering) materials, fast solutions either fail or degenerate to inefficient, brute-force simulations of the underlying light transport. In particular, many-light algorithms are able to provide fast approximations by clamping elements of the light transport matrix, but they eliminate the part of the transport that contributes to accurate glossy appearance. In this paper we introduce a solution that separately solves for the global (low-rank, dense) and local (highrank, sparse) illumination components. For the low-rank component we introduce visibility clustering and approximation, while for the high-rank component we introduce a local light technique to correct for the missing illumination. Compared to competing techniques we achieve superior gloss rendering in minutes, making our technique suitable for applications such as industrial design and architecture, where material appearance is critical.
References:
1. Arikan, O., Forsyth, D. A., and O’Brien, J. F. 2005. Fast and detailed approximate global illumination by irradiance decomposition. ACM Trans. Graph. 24, 3, 1108–1114. Google ScholarDigital Library
2. Bekaert, P., Sbert, M., and Halton, J. 2002. Accelerating path tracing by reusing paths. In Eurographics Workshop on Rendering, 125–134. Google ScholarDigital Library
3. Cheslack-Postava, E., Wang, R., Akerlund, O., and Pellacini, F. 2008. Fast, realistic lighting and material design using nonlinear cut approximation. ACM Trans. Graph. 27, 5, 128:1–128:10. Google ScholarDigital Library
4. Dong, Z., Grosch, T., Ritschel, T., Kautz, J., and Seidel, H.-P. 2009. Real-time indirect illumination with clustered visibility. In Vision, Modeling, and Visualization Workshop 2009.Google Scholar
5. Hachisuka, T., and Jensen, H. W. 2009. Stochastic progressive photon mapping. ACM Trans. Graph. 28, 5, 1–8. Google ScholarDigital Library
6. Hachisuka, T., Ogaki, S., and Jensen, H. W. 2008. Progressive photon mapping. ACM Trans. Graph. 27, 5, 130:1–130:8. Google ScholarDigital Library
7. Hašan, M., Pellacini, F., and Bala, K. 2007. Matrix row-column sampling for the many-light problem. ACM Trans. Graph. 26, 3, 26:1–26:10. Google ScholarDigital Library
8. Hašan, M., Křivánek, J., Walter, B., and Bala, K. 2009. Virtual spherical lights for many-light rendering of glossy scenes. ACM Trans. Graph. 28, 5, 143:1–143:6. Google ScholarDigital Library
9. Jensen, H. W. 2001. Realistic image synthesis using photon mapping. A. K. Peters, Ltd., Natick, MA, USA. Google ScholarDigital Library
10. Keller, A. 1997. Instant radiosity. In Proc. SIGGRAPH 97, 49–56. Google ScholarDigital Library
11. Kollig, T., and Keller, A. 2004. Illumination in the presence of weak singularities. In Monte Carlo and Quasi-Monte Carlo Methods, 245–257.Google Scholar
12. Křivánek, J., Ferwerda, J. A., and Bala, K. 2010. Effects of global illumination approximations on material appearance. ACM Trans. Graph. 29, 4, 112:1–112:10. Google ScholarDigital Library
13. Laine, S., Saransaari, H., Kontkanen, J., Lehtinen, J., and Aila, T. 2007. Incremental instant radiosity for real-time indirect illumination. In Eurographics Symposium on Rendering, 277–286. Google ScholarDigital Library
14. Laurijssen, J., Wang, R., Dutré, P., and Brown, B. J. 2010. Fast estimation and rendering of indirect highlights. Computer Graphics Forum 29, 4, 1305–1313. Google ScholarDigital Library
15. Ramanarayanan, G., Ferwerda, J., Walter, B., and Bala, K. 2007. Visual equivalence: towards a new standard for image fidelity. ACM Trans. Graph. 26, 3, 76:1–76:11. Google ScholarDigital Library
16. Ritschel, T., Grosch, T., Kim, M. H., Seidel, H.-P., Dachsbacher, C., and Kautz, J. 2008. Imperfect shadow maps for efficient computation of indirect illumination. ACM Trans. Graph. 27, 5, 129:1–129:8. Google ScholarDigital Library
17. Ritschel, T., Engelhardt, T., Grosch, T., Seidel, H.-P., Kautz, J., and Dachsbacher, C. 2009. Micro-rendering for scalable, parallel final gathering. ACM Trans. Graph. 28, 5, 132:1–132:8. Google ScholarDigital Library
18. Segovia, B., Iehl, J.-C., and Péroche, B. 2006. Bidirectional instant radiosity. In Eurographics Symposium on Rendering, 389–398. Google ScholarDigital Library
19. Veach, E. 1997. Robust Monte Carlo Methods for Light Transport Simulation. PhD thesis, Stanford University. Google ScholarDigital Library
20. Walter, B., Arbree, A., Bala, K., and Greenberg, D. P. 2006. Multidimensional lightcuts. ACM Trans. Graph. 25, 3, 1081–1088. Google ScholarDigital Library
21. Wang, R., Wang, R., Zhou, K., Pan, M., and Bao, H. 2009. An efficient GPU-based approach for interactive global illumination. ACM Trans. Graph. 28, 3, 91:1–91:8. Google ScholarDigital Library
