. En-vert,-un-cône-causant-une-hyperbole, En rouge, le cas de l'ellipse. En bleu, celui de la parabole. On remarque que les deux derniers cas apparaissent lorsque l

]. T. Annen, J. Kautz, F. Durand, and H. Seidel, A gauche l'image de référence obtenue par la méthode brutale (12 fps, pas d'´ echantillonnage = 0.15). ` A droite l'image obtenue avec 32échantillons32´32échantillons distribués avec notre fonction de probabilité de densité (12 fps) Le résultat est filtré sur l'objet en choisissant un filtre adapté au bruit (un filtre plus petit ne réduit pas suffisamment le bruit) Le reflet filtré est plus large et sa partie saturée est réduite Spherical harmonic gradients, F??. 2.24 ? La scène est identiquè a celle de la figure 2.23 SIGGRAPH '04 : ACM SIGGRAPH 2004 Sketches, p.110, 2004.

J. Arvo, The irradiance Jacobian for partially occluded polyhedral sources, Proceedings of the 21st annual conference on Computer graphics and interactive techniques , SIGGRAPH '94, pp.343-350, 1994.
DOI : 10.1145/192161.192250

J. F. Blinn, Models of light reflection for computer synthesized pictures, SIGGRAPH '77 : Proceedings of the 4th annual conference on Computer graphics and interactive techniques, pp.192-198, 1977.

J. F. Blinn and M. E. Newell, Texture and reflection in computer generated images, pp.542-547, 1976.

B. Cabral, M. Olano, and P. Nemec, Reflection space image based rendering, Proceedings of the 26th annual conference on Computer graphics and interactive techniques , SIGGRAPH '99, pp.165-170, 1999.
DOI : 10.1145/311535.311553

M. F. Cohen, J. Wallace, and P. Hanrahan, Radiosity and realistic image synthesis, 1993.

C. R. Gene and . Miller, Illumination and reflection maps : Simulated objects in simulated and real environments, SIGGRAPH '84 Advanced Computer Graphics Animation seminar notes, 1984.

S. J. Gortler, R. Grzeszczuk, R. Szeliski, and M. F. Cohen, The lumigraph, Proceedings of the 23rd annual conference on Computer graphics and interactive techniques , SIGGRAPH '96, pp.43-54, 1996.
DOI : 10.1145/237170.237200

W. Heidrich and H. Seidel, Realistic, hardware-accelerated shading and lighting, Proceedings of the 26th annual conference on Computer graphics and interactive techniques , SIGGRAPH '99, pp.171-178, 1999.
DOI : 10.1145/311535.311554

J. T. Kajiya, The rendering equation, SIGGRAPH '86 : Proceedings of the 13th annual conference on Computer graphics and interactive techniques, pp.143-150, 1986.

N. Kambhatla and T. K. Leen, Dimension Reduction by Local Principal Component Analysis, Neural Computation, 1997.
DOI : 10.1162/neco.1993.5.3.363

J. Kautz and M. D. Mccool, Interactive rendering with arbitrary brdfs using separable approximations, Proceedings of the Eurographics Workshop on Rendering Techniques 1999, pp.185-196, 1999.

J. Kautz and M. D. Mccool, Approximation of glossy reflexion with prefiltered environment maps, Proceedings Graphics Interface 2000, pp.119-126, 2000.

J. Kautz, P. Sloan, and J. Snyder, Fast, arbitrary brdf shading for lowfrequency lighting using spherical harmonics, EGRW '02 : Proceedings of the 13th Eurographics workshop on Rendering, pp.291-296

J. Kautz, P. V-`-azquez, W. Heidrich, and H. Seidel, A Unified Approach to Prefiltered Environment Maps, Proceedings of the Eurographics Workshop on Rendering Techniques, pp.185-196, 2000.
DOI : 10.1007/978-3-7091-6303-0_17

A. W. Kristensen, T. Akenine-möller, and H. W. Jensen, Precomputed local radiance transfer for real-time lighting design, SIGGRAPH '05 : ACM SIGGRAPH 2005 Papers, pp.1208-1215, 2005.
DOI : 10.1145/1186822.1073334
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.87.8865

E. P. Lafortune, S. Foo, K. E. Torrance, and D. P. Greenberg, Non-linear approximation of reflectance functions, Proceedings of the 24th annual conference on Computer graphics and interactive techniques , SIGGRAPH '97, pp.117-126, 1997.
DOI : 10.1145/258734.258801

H. P. Lensch, M. Goesele, Y. Chuang, T. Hawkins, S. Marschner et al., Realistic materials in computer graphics, ACM SIGGRAPH 2005 Courses on , SIGGRAPH '05, p.1, 2005.
DOI : 10.1145/1198555.1198601

D. K. Mcallister, A. Lastra, and W. Heidrich, Efficient rendering of spatial bi-directional reflectance distribution functions, HWWS '02 : Proceedings of the ACM SIGGRAPH/EUROGRAPHICS conference on Graphics hardware, pp.79-88, 2002.

M. D. Mccool, J. Ang, and A. Ahmad, Homomorphic factorization of BRDFs for high-performance rendering, Proceedings of the 28th annual conference on Computer graphics and interactive techniques , SIGGRAPH '01, pp.171-178, 2001.
DOI : 10.1145/383259.383276

R. Ng, R. Ramamoorthi, and P. Hanrahan, All-frequency shadows using non-linear wavelet lighting approximation, SIGGRAPH '03 : ACM SIG- GRAPH 2003 Papers, pp.376-381, 2003.
DOI : 10.1145/1201775.882280
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.127.7799

R. Ng, R. Ramamoorthi, and P. Hanrahan, Triple product wavelet integrals for all-frequency relighting, SIGGRAPH '04 : ACM SIGGRAPH, 2004.

A. Ngan, F. Durand, and W. Matusik, Experimental validation of analytical BRDF models, ACM SIGGRAPH 2004 Sketches on , SIGGRAPH '04, 2004.
DOI : 10.1145/1186223.1186336

B. T. Phong, Illumination for computer generated pictures, Communications of the ACM, vol.18, issue.6, pp.311-317, 1975.
DOI : 10.1145/360825.360839

R. Ramamoorthi and P. Hanrahan, An efficient representation for irradiance environment maps, Proceedings of the 28th annual conference on Computer graphics and interactive techniques , SIGGRAPH '01, pp.497-500, 2001.
DOI : 10.1145/383259.383317

S. Rusinkiewicz, A New Change of Variables for Efficient BRDF Representation, Rendering Techniques '98 (Proceedings of Eurographics Rendering Workshop '98), pp.11-22, 1998.
DOI : 10.1007/978-3-7091-6453-2_2

P. S. Shirley, Physically based lighting calculations for computer graphics, 1991.
DOI : 10.1007/978-3-662-09287-3_5

P. Sloan, Normal mapping for precomputed radiance transfer, Proceedings of the 2006 symposium on Interactive 3D graphics and games , SI3D '06, pp.23-26, 2006.
DOI : 10.1145/1111411.1111415

P. Sloan, J. Hall, J. Hart, and J. Snyder, Clustered principal components for precomputed radiance transfer, SIGGRAPH '03 : ACM SIGGRAPH 2003 Papers, pp.382-391, 2003.
DOI : 10.1145/1201775.882281
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.75.8959

P. Sloan, J. Kautz, and J. Snyder, Precomputed radiance transfer for real-time rendering in dynamic, low-frequency lighting environments, SIGGRAPH '02 : Proceedings of the 29th annual conference on Computer graphics and interactive techniques, pp.527-536, 2002.

P. Sloan, B. Luna, and J. Snyder, Local, deformable precomputed radiance transfer, SIGGRAPH '05 : ACM SIGGRAPH 2005 Papers, pp.1216-1224, 2005.
DOI : 10.1145/1186822.1073335

L. Szirmay-kalos, B. Aszódi, I. Lazányi, and M. Premecz, Approximate Ray-Tracing on the GPU with Distance Impostors, Proc. Eurographics 2005), 2005.
DOI : 10.1111/j.1467-8659.2005.0m894.x

E. Veach and L. J. Guibas, Optimally combining sampling techniques for Monte Carlo rendering, Proceedings of the 22nd annual conference on Computer graphics and interactive techniques , SIGGRAPH '95, pp.419-428, 1995.
DOI : 10.1145/218380.218498
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.127.8105

J. Wang, K. Xu, K. Zhou, S. Lin, S. Hu et al., Spherical harmonics scaling, The Visual Computer, vol.24, issue.3, pp.713-720, 2006.
DOI : 10.1007/s00371-006-0057-8