ESLPV: enhanced subsurface light propagation volumes

Koa, Ming Di; Johan, Henry

doi:10.1007/s00371-014-0952-3

Cited by 8 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of each iteration are accumulated to estimate the final output. This naive SSLPV scheme can be further enhanced by incorporating extra single scattering [KJ14], resulting in a more complete and efficient framework.…”

Section: Scene-based Discretizationmentioning

confidence: 99%

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Liang,

Gao,

et al. 2023

Computer Graphics Forum

View full text Add to dashboard Cite

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.

show abstract

Section: Scene-based Discretizationmentioning

confidence: 99%

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Liang,

Gao,

et al. 2023

Computer Graphics Forum

View full text Add to dashboard Cite

show abstract

“…This modified LPV can be used to acquire the transmitted flux from inside an object. Di Koa and Johan [120] enhanced this technique to optimize the VPLs scattering with a ray marching process and used an additional voxel volume to accelerate the propagation pass.…”

Section: ) Subsurface Scattering and Translucencymentioning

confidence: 99%

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Lambru¹,

Morar

Moldoveanu

et al. 2021

IEEE Access

View full text Add to dashboard Cite

The most important component of photorealism in Computer Graphics is given by a physically correct approximation of the light transport. Besides the direct illumination from light sources, there is an indirect illumination, produced by the reflections of the light rays on other surfaces of the scene. In Computer Graphics, the process of computing the illumination of a surface by considering both the direct and the indirect illumination is widely known as global illumination. This paper describes several classes of real-time global illumination techniques used in current game engines together with our own implementations of these approaches. All implementations were made in our own framework, specially designed with a multi-pass rendering architecture that allows fast implementation of rendering techniques and the reuse of functionalities. We analyze these classes based on the following criteria: the visual results produced by the indirect diffuse lighting, the ability to produce glossy reflections, shadows, ambient occlusion, subsurface scattering, translucency and volumetric lighting as well as the ability to simulate area lights. We present the quantitative results of our implementations, obtained with the same external parameters for all techniques, thanks to the unified implementations in the same framework. An important observation is that our analysis is focused on the techniques that are based on the rasterization pipeline, thus, the comparison does not include the techniques designed entirely for the ray-tracing pipeline.

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

ESLPV: enhanced subsurface light propagation volumes

Cited by 8 publications

References 31 publications

State of the Art in Efficient Translucent Material Rendering with BSSRDF

State of the Art in Efficient Translucent Material Rendering with BSSRDF

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Data compression for measured heterogeneous subsurface scattering via scattering profile blending

Contact Info

Product

Resources

About