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Issue No.10 - Oct. (2012 vol.18)
pp: 1591-1602
Charles de Rousiers , INRIA Rhone-Alpes, Grenoble
Adrien Bousseau , INRIA Sophia-Antipolis, Sophia-Antipolis
Kartic Subr , University College London, London
Nicolas Holzschuch , INRIA Rhone-Alpes, Grenoble
Ravi Ramamoorthi , University of California, Berkeley, Berkeley
We present an algorithm to render objects made of transparent materials with rough surfaces in real-time, under all-frequency distant illumination. Rough surfaces cause wide scattering as light enters and exits objects, which significantly complicates the rendering of such materials. We present two contributions to approximate the successive scattering events at interfaces, due to rough refraction: First, an approximation of the Bidirectional Transmittance Distribution Function (BTDF), using spherical Gaussians, suitable for real-time estimation of environment lighting using preconvolution; second, a combination of cone tracing and macrogeometry filtering to efficiently integrate the scattered rays at the exiting interface of the object. We demonstrate the quality of our approximation by comparison against stochastic ray tracing. Furthermore we propose two extensions to our method for supporting spatially varying roughness on object surfaces and local lighting for thin objects.
Surface roughness, Real time systems, Rough surfaces, Geometry, Scattering, Lighting, normal distribution function., Real-time rendering, translucent material, bidirectional transmittance distribution function
Charles de Rousiers, Adrien Bousseau, Kartic Subr, Nicolas Holzschuch, Ravi Ramamoorthi, "Real-Time Rendering of Rough Refraction", IEEE Transactions on Visualization & Computer Graphics, vol.18, no. 10, pp. 1591-1602, Oct. 2012, doi:10.1109/TVCG.2011.282
[1] C. Wyman, "An Approximate Image-Space Approach for Interactive Refraction," ACM Trans. Graphics, vol. 24, no. 3, pp. 1050-1053, 2005.
[2] M.M. Oliveira and M. Brauwers, "Real-Time Refraction through Deformable Objects," Proc. Symp. Interactive 3D Graphics and Games (I3D), pp. 89-96, 2007.
[3] E.A. Khan, E. Reinhard, R.W. Fleming, and H.H. Bülthoff, "Image-Based Material Editing," ACM Trans. Graphics, vol. 25, pp. 654-663, , July 2006.
[4] S.K. Yeung, C.-K. Tang, M.S. Brown, and S.B. Kang, "Matting and Compositing of Transparent and Refractive Objects," ACM Trans. Graphics, vol. 30, no. 1, pp. 1-13, 2011.
[5] R.W. Fleming, R.O. Dror, and E.H. Adelson, "Real-World Illumination and the Perception of Surface Reflectance Properties," J. Vision, vol. 3, no. 5, pp. 347-368, 2003.
[6] B. Walter, S.R. Marschner, H. Li, and K.E. Torrance, "Microfacet Models for Refraction through Rough Surfaces," Proc. Eurographics Symp. Rendering, 2007.
[7] J. Kautz, P.-P. Vázquez, W. Heidrich, and H.-P. Seidel, "Unified Approach to Prefiltered Environment Maps," Proc. Eurographics Workshop Rendering, pp. 185-196, 2000.
[8] R. Ramamoorthi and P. Hanrahan, "Frequency Space Environment Map Rendering," ACM Trans. Graphics, vol. 21, no. 3, pp. 517-526, 2002.
[9] J. Amanatides, "Ray Tracing with Cones," Computer Graphics, vol. 18, no. 3, pp. 129-135, 1984.
[10] C. Han, B. Sun, R. Ramamoorthi, and E. Grinspun, "Frequency Domain Normal Map Filtering," ACM Trans. Graphics, vol. 26, no. 3, p. 28, 2007.
[11] C. de Rousiers, A. Bousseau, K. Subr, N. Holzschuch, and R. Ramamoorthi, "Real-Time Rough Refraction," Proc. Symp. Interactive 3D Graphics and Games (I3D '11), pp. 111-118, , 2011.
[12] X. Sun, K. Zhou, E. Stollnitz, J. Shi, and B. Guo, "Interactive Relighting of Dynamic Refractive Objects," ACM Trans. Graphics, vol. 27, no. 3, pp. 1-9, 2008.
[13] I. Ihrke, G. Ziegler, A. Tevs, C. Theobalt, M. Magnor, and H.-P. Seidel, "Eikonal Rendering: Efficient Light Transport in Refractive Objects," ACM Trans. Graphics, vol. 26, no. 3, p. 59, Aug. 2007.
[14] C. Cao, Z. Ren, B. Guo, and K. Zhou, "Interactive Rendering of Non-Constant, Refractive Media Using the Ray Equations of Gradient-Index Optics," Computer Graphics Forum, vol. 29, no. 4, pp. 1375-1382, v29i4pp1375-1382.pdf, 2010.
[15] W. Heidrich, H. Lensch, M.F. Cohen, and H.-P. Seidel, "Light Field Techniques for Reflections and Refractions," Proc. Eurographics Symp. Rendering, 1999.
[16] E. Eisemann and X. Décoret, "Fast Scene Voxelization and Applications," Proc. Symp. Interactive 3D Graphics and Games (I3D), pp. 71-78, 2006.
[17] J.F. Blinn, "Models of Light Reflection for Computer Synthesized Pictures," Computer Graphics, vol. 11, no. 3, pp. 192-198, 1977.
[18] Q. Dai, J. Wang, Y. Liu, J. Snyder, E. Wu, and B. Guo, "The Dual-Microfacet Model for Capturing Thin Transparent Slabs," Computer Graphics Forum, vol. 28, no. 7, pp. 1917-1925, 2009.
[19] R. Ramamoorthi and P. Hanrahan, "A Signal-Processing Framework for Inverse Rendering," Proc. SIGGRAPH '01, pp. 117-128, 2001.
[20] M. Toksvig, "Mipmapping Normal Maps," J. Graphics, GPU, and Game Tools, vol. 10, no. 3, pp. 65-71, 2005.
[21] J. Wang, P. Ren, M. Gong, J. Snyder, and B. Guo, "All-frequency Rendering of Dynamic, Spatially-Varying Reflectance," ACM Trans. Graphics, vol. 28, no. 5, p. 1, 2009.
[22] S.G. Parker, J. Bigler, A. Dietrich, H. Friedrich, J. Hoberock, D. Luebke, D. McAllister, M. McGuire, K. Morley, A. Robison, and M. Stich, "Optix: A General Purpose Ray Tracing Engine," ACM Trans. Graphics, vol. 29, no. 4, pp. 1-13, 2010.
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