Interactive subsurface scattering for translucent meshes

Hao, Xuejun; Baby, Thomas; Varshney, Amitabh

doi:10.1145/641480.641497

Cited by 39 publications

(13 citation statements)

References 39 publications

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“…It was first used to accelerate MC algorithms [24], [27] and then several papers extended these algorithms to improve their quality [7], [10], [11], [32]. Recently, the dipole diffusion BSSRDF has been used to create real-time algorithms [5], [6], [8], [21], [22], [31], [33], [34]; included in precomputed radiance transfer systems [41], [48]; and scaled to large scenes using a Light cuts based algorithm [2], [46].…”

Section: Dipole Diffusion Algorithmsmentioning

confidence: 99%

Heterogeneous Subsurface Scattering Using the Finite Element Method

Arbree

Walter

Bala

2011

IEEE Trans. Visual. Comput. Graphics

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Abstract-Materials with visually important heterogeneous subsurface scattering, including marble, skin, leaves, and minerals, are common in the real world. However, general, accurate and efficient rendering of these materials is an open problem. In this paper, we describe a finite element (FE) solution of the heterogeneous diffusion equation (DE) that solves this problem. Our algorithm is the first to use the FE method to solve the difficult problem of heterogeneous subsurface rendering. To create our algorithm, we make two contributions. First, we correct previous work and derive an accurate and complete heterogeneous diffusion formulation. This formulation has two key elements: an accurate model of the reduced intensity (RI) source, the diffusive source boundary condition (DSBC), and its associated render query function. Second, we solve this formulation accurately and efficiently using the FE method. Using there results, we can render subsurface scattering with a simple four step algorithm. To demonstrate that our algorithm is simultaneously general, accurate and efficient, we test its performance on a series of difficult scenes. For a wide range of materials and geometry, it produces, in minutes, images that nearly match path traced references, that required hours.

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Section: Dipole Diffusion Algorithmsmentioning

confidence: 99%

Heterogeneous Subsurface Scattering Using the Finite Element Method

Arbree

Walter

Bala

2011

IEEE Trans. Visual. Comput. Graphics

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“…For homogeneous material models, some efficient rendering techniques have been presented [Jensen and Buhler 2002; Figure 2: Light scattering geometry for quasi-homogeneous materials. Mertens et al 2003;Hao et al 2003;Lensch et al 2003]. …”

Section: Related Workmentioning

confidence: 99%

Modeling and rendering of quasi-homogeneous materials

et al. 2005

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Many translucent materials consist of evenly-distributed heterogeneous elements which produce a complex appearance under different lighting and viewing directions. For these quasi-homogeneous materials, existing techniques do not address how to acquire their material representations from physical samples in a way that allows arbitrary geometry models to be rendered with these materials. We propose a model for such materials that can be readily acquired from physical samples. This material model can be applied to geometric models of arbitrary shapes, and the resulting objects can be efficiently rendered without expensive subsurface light transport simulation. In developing a material model with these attributes, we capitalize on a key observation about the subsurface scattering characteristics of quasi-homogeneous materials at different scales. Locally, the non-uniformity of these materials leads to inhomogeneous subsurface scattering. For subsurface scattering on a global scale, we show that a lengthy photon path through an even distribution of heterogeneous elements statistically resembles scattering in a homogeneous medium. This observation allows us to represent and measure the global light transport within quasi-homogeneous materials as well as the transfer of light into and out of a material volume through surface mesostructures. We demonstrate our technique with results for several challenging materials that exhibit sophisticated appearance features such as transmission of back illumination through surface mesostructures.

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“…To this single scattering solution, Jensen et al used diffusion approximations for multiple scattering to rapidly compute subsurface scattering in homogeneous media [Jensen et al 2001;Jensen and Buhler 2002] (see also [Koenderink and van Doorn 2001]). Recently, several researchers have proposed methods for interactive rendering of homogeneous scattering materials [Mertens et al 2003;Hao et al 2003]. A large number of translucent objects, however, are not homogeneous, such as veined marble and human skin, and an efficient rendering technique that accommodates some degree of non-homogeneity is desirable.…”

Section: Related Workmentioning

confidence: 99%

Shell texture functions

Chen¹,

Tong²,

Wang³

et al. 2004

ACM SIGGRAPH 2004 Papers

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We propose a texture function for realistic modeling and efficient rendering of materials that exhibit surface mesostructures, translucency and volumetric texture variations. The appearance of such complex materials for dynamic lighting and viewing directions is expensive to calculate and requires an impractical amount of storage to precompute. To handle this problem, our method models an object as a shell layer, formed by texture synthesis of a volumetric material sample, and a homogeneous inner core. To facilitate computation of surface radiance from the shell layer, we introduce the shell texture function (STF) which describes voxel irradiance fields based on precomputed fine-level light interactions such as shadowing by surface mesostructures and scattering of photons inside the object. Together with a diffusion approximation of homogeneous inner core radiance, the STF leads to fast and detailed raytraced renderings of complex materials.

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Interactive subsurface scattering for translucent meshes

Cited by 39 publications

References 39 publications

Heterogeneous Subsurface Scattering Using the Finite Element Method

Heterogeneous Subsurface Scattering Using the Finite Element Method

Modeling and rendering of quasi-homogeneous materials

Shell texture functions

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