Shell texture functions

Chen, Yanyun; Tong, Xin; Wang, Jiaping; Lin, Stephen; Guo, Baining; Shum, Heung-Yeung

doi:10.1145/1186562.1015726

Cited by 28 publications

(32 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, because it is easy to implement and inexpensive, the dipole diffusion BSSRDF has been widely used. 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%

“…First, if all the PDE's coefficients are bounded and have bounded derivatives 7 , then the FE matrix is positive definite and always has a solution. Second, the components of the FE matrix are non-zero only when the support of the basis functions overlaps.…”

Section: Overviewmentioning

confidence: 99%

“…Second, the components of the FE matrix are non-zero only when the support of the basis functions overlaps. If the basis functions are spatially compact (as most 7. This condition is stronger than necessary.…”

Section: Overviewmentioning

confidence: 99%

See 2 more Smart Citations

Heterogeneous Subsurface Scattering Using the Finite Element Method

Arbree

Walter

Bala

2011

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

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.

show abstract

Section: Dipole Diffusion Algorithmsmentioning

confidence: 99%

Section: Overviewmentioning

confidence: 99%

See 1 more Smart Citation

Heterogeneous Subsurface Scattering Using the Finite Element Method

Arbree

Walter

Bala

2011

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

show abstract

“…More general representations include the shell texture function [20], view-dependent displacement map [21], and generalized displacement maps [22]. These representations, though being able to capture more general local effects such as subsurface scattering and fine-scale silhouettes, are also more expensive to store and/or render, and are not as widely used as BTFs.…”

Section: Related Workmentioning

confidence: 99%

Radiance Transfer Biclustering for Real-Time All-Frequency Biscale Rendering

Sun

Hou

Ren

et al. 2011

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

Abstract-We present a real-time algorithm to render all-frequency radiance transfer at both macroscale and mesoscale. At a mesoscale, the shading is computed on a per-pixel basis by integrating the product of the local incident radiance and a bidirectional texture function. While at a macroscale, the precomputed transfer matrix, which transfers the global incident radiance to the local incident radiance at each vertex, is losslessly compressed by a novel biclustering technique. The biclustering is directly applied on the radiance transfer represented in a pixel basis, on which the BTF is naturally defined. It exploits the coherence in the transfer matrix and a property of matrix element values to reduce both storage and runtime computation cost. Our new algorithm renders at real-time frame rates realistic materials and shadows under all-frequency direct environment lighting. Comparisons show that our algorithm is able to generate images that compare favorably with reference ray tracing results, and has obvious advantages over alternative methods in storage and preprocessing time.

show abstract

“…Shell texture functions [Chen et al 2004], much like relief mapping attempts to render the subsurface details of a polygon. However, unlike relief mapping, which restricts itself to finding a new, more detailed surface, shell texture functions attempts to ray trace a complex volumetric data set.…”

Section: Introductionmentioning

confidence: 99%

Rendering 3D volumes using per-pixel displacement mapping

Risser

2007

Proceedings of the 2007 ACM SIGGRAPH Symposium on Video Games

View full text Add to dashboard Cite

Rendering 3D Volumes Using Per-Pixel Displacement Mapping offers a simple and practical solution to the problem of seamlessly integrating many highly detailed 3D objects into a scene without the need to render large sets of polygons or introduce the overhead of an obtrusive scene-graph. This work takes advantage of modern programmable GPU's as well as recent related research in the area of per-pixel displacement mapping to achieve view independent, fully 3D rendering with per-pixel level of detail. To achieve this, a box is used to bound texture-defined volumes. The box acts as a surface to which the volume will be drawn on. By computing a viewing ray from the camera to a point on the box and using that point as a ray origin, the correct intersection with the texture volume can be found using various per-pixel displacement mapping techniques. Once the correct intersection is found, the final color value for the corresponding point on the box can be computed. The technique supports various effects taken both from established raycasting and ray-tracing methods such as reflection, refraction, selfshadowing on models, a simple animation scheme and an efficient method for finding distances through volumes.

show abstract

Shell texture functions

Cited by 28 publications

References 34 publications

Heterogeneous Subsurface Scattering Using the Finite Element Method

Heterogeneous Subsurface Scattering Using the Finite Element Method

Radiance Transfer Biclustering for Real-Time All-Frequency Biscale Rendering

Rendering 3D volumes using per-pixel displacement mapping

Contact Info

Product

Resources

About