SSLPV

Børlum, Jesper; Christensen, Brian B.; Kjeldsen, Thomas Kim; Mikkelsen, Peter Trier; Noe, Karsten Østergaard; Rimestad, Jens; Mosegaard, Jesper

doi:10.1145/2018323.2018325

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…Since the light propagation volume (LPV) [KD10] naturally fits the discrete representation of materials, it is extended from indirect illumination on the surface to light propagation in the medium, known as SSLPV [BCK*11]. The SSLPV algorithm mainly consists of two steps (Figure 16).…”

Section: Other Related Topicsmentioning

confidence: 99%

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Liang,

Gao,

et al. 2023

Computer Graphics Forum

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Sub‐surface scattering is always an important feature in translucent material rendering. When light travels through optically thick media, its transport within the medium can be approximated using diffusion theory, and is appropriately described by the bidirectional scattering‐surface reflectance distribution function (BSSRDF). BSSRDF methods rely on assumptions about object geometry and light distribution in the medium, which limits their applicability to general participating media problems. However, despite the high computational cost of path tracing, BSSRDF methods are often favoured due to their suitability for real‐time applications. We review these methods and discuss the most recent breakthroughs in this field. We begin by summarizing various BSSRDF models and then implement most of them in a 2D searchlight problem to demonstrate their differences. We focus on acceleration methods using BSSRDF, which we categorize into two primary groups: pre‐computation and texture methods. Then we go through some related topics, including applications and advanced areas where BSSRDF is used, as well as problems that are sometimes important yet are ignored in sub‐surface scattering estimation. In the end of this survey, we point out remaining constraints and challenges, which may motivate future work to facilitate sub‐surface scattering.

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Section: Other Related Topicsmentioning

confidence: 99%

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Liang,

Gao,

et al. 2023

Computer Graphics Forum

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“…A similar method with a data structure, which is known as the light propagation volume (LPV) [15], is often used in real-time applications. Although the LPV is typically used to represent weak scattering in aerosols, it has also been applied to render optically dense translucent materials [16,17]. The main drawback of these volumetric approaches is that they often produce blurry results because of the utilization of volumetric parameter mappings on low-resolution discretized grids.…”

Section: Translucency Renderingmentioning

confidence: 99%

Data compression for measured heterogeneous subsurface scattering via scattering profile blending

et al. 2019

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Subsurface scattering involves the complicated behavior of light beneath the surfaces of translucent objects that includes scattering and absorption inside the object's volume. Physically accurate numerical representation of subsurface scattering requires a large number of parameters because of the complex nature of this phenomenon. The large amount of data restricts the use of the data on memory-limited devices such as video game consoles and mobile phones. To address this problem, this paper proposes an efficient data compression method for heterogeneous subsurface scattering. The key insight of this study is that heterogeneous materials often comprise a limited number of base materials, and the size of the subsurface scattering data can be significantly reduced by parameterizing only a few base materials. In the proposed compression method, we represent the scattering property of a base material using a function referred to as the base scattering profile. A small subset of the base materials is assigned to each surface position, and the local scattering property near the position is described using a linear combination of the base scattering profiles in the log scale. The proposed method reduces the data by a factor of approximately 30 compared to a state-of-the-art method, without significant loss of visual quality in the rendered graphics. In addition, the compressed data can also be used as bidirectional scattering surface reflectance distribution functions (BSSRDF) without incurring much computational overhead. These practical aspects of the proposed method also facilitate the use of higher-resolution BSSRDFs in devices with large memory capacity.

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“…(16) For example, Figure 5 shows the plot of S(t) when W = [1.0, 0.6, 0.2, 0.4, 0.8, 0.6, 1.0] . Finally, S(t) is combined with the function for locally adjusting the energy intensity (13), and the new distribution function is defined as:…”

Section: Locally Adjusting Intensity By a B-spline Basis Functionmentioning

confidence: 99%

“…These methods are more focused on drawing a specific shape, and cannot directly be applied for rendering the energy-wave. Pasko [11], Schmitt [12] and Børlum [13] can express transparency and intensity. These methods are, however, for simulating the optical phenomenon of the incoming light within the geometric shape, and not suitable for the energy-wave expression in which the space itself emits the light.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Rendering Technique for Visual Expression of Arbitrary-Shaped Energy Wave

Watanabe

Abe

Konno

2016

The Journal of the Society for Art and Science

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A visual expression called Energy-Wave, which shows light emission from high-energy fields, is popularly used in creative contents such as animations and computer games. This research proposes a new method for representing energy-Wave in real-time 3D graphics. Conventional energy-wave rendering techniques use the animation texture or the particle animation. However, the animationtexture method restricts the view point, and the boundaries of the energy-wave appear too clearly. The particle-animation method is not suitable for showing a dense energy field and not appropriate for covering a wide region. This paper presents a new method in which the energy distribution is described as a continuous scalar function. The new method is advantageous over the conventional methods since there is no restriction of the view point, resolution, and the covering region. The proposed method also utilizes GPGPU, and the output images are dynamically created from small input and can quickly deform the shape of the energy wave. The previous work of this research was able to deal with point-centered and line-centered energy-distribution functions. The new method can deal with torus-shaped and quadratic curve-centered distribution functions quickly.

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SSLPV

Cited by 10 publications

References 20 publications

State of the Art in Efficient Translucent Material Rendering with BSSRDF

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Data compression for measured heterogeneous subsurface scattering via scattering profile blending

Real-Time Rendering Technique for Visual Expression of Arbitrary-Shaped Energy Wave

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