Accurate Appearance Preserving Prefiltering for Rendering Displacement-Mapped Surfaces Lifan Wu 1 Shuang Zhao 2 Ling-Qi Yan 3 Ravi Ramamoorthi 1 1 University of California, San Diego 2 University of California, Irvine 3 University of California, Santa Barbara
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Accurate Appearance Preserving Prefiltering for Rendering ...Lifan Wu1 Shuang Zhao2 Ling-Qi Yan3 Ravi Ramamoorthi1 1University of California, San Diego 2Universityof California, Irvine
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Accurate Appearance Preserving Prefiltering for Rendering Displacement-Mapped Surfaces
Lifan Wu1 Shuang Zhao2
Ling-Qi Yan3 Ravi Ramamoorthi1
1University of California, San Diego 2University of California, Irvine3University of California, Santa Barbara
Realistic Appearance Models
Simple surface Complex surface
Image courtesy of Mitsuba [Jakob 2010]
Appearance Models with Rich Details
[Zhao et al. 2011][Jakob et al. 2010] [Heitz et al. 2015] [Khungurn et al. 2015]
[Wu et al. 2011][Han et al. 2007] [Yan et al. 2014, 2016]
Modeling Details
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Base shape
Micro-geometry Micro-scattering
Normal map (2D)
Disp. map (2D)
Volume(3D)
BRDF(Hemispherical)
Phase function(Spherical)
Problems
Complex light-surfaceinteraction
ray
Micro-geometryDifficult to
compute and analyze
Motivation• Camera zooming out ➔ less details are visible ➔ use coarser models