A practical analytic model for the radiosity of translucent scenes

Abstract

Light propagation in scenes with translucent objects is hard to model efficiently for interactive applications. The inter-reflections between objects and their environments and the subsurface scattering through the materials intertwine to produce visual effects like color bleeding, light glows and soft shading. Monte-Carlo based approaches have demonstrated impressive results but are computationally expensive, and faster approaches model either only interreflections or only subsurface scattering. In this paper, we present a simple analytic model that combines diffuse inter-reflections and isotropic subsurface scattering. Our approach extends the classical work in radiosity by including a subsurface scattering matrix that operates in conjunction with the traditional form-factor matrix. This subsurface scattering matrix can be constructed using analytic, measurement-based or simulation-based models and can capture both homogeneous and heterogeneous translucencies. Using a fast iterative solution to radiosity, we demonstrate scene relighting and dynamically varying object translucencies at near interactive rates.

Modelling and simulation of direct solar radiation for cost-effectiveness analysis of V-Trough photovoltaic devices

“…Moreover, analytical models tend to be considerably less computationally expensive when it comes to radiation simulation [24,32], and that is a crucial feature for real-time interactive modelling for design purposes. Tina and Scandura [34], Bahaidarah et al [5], Kostić et al [20], Reis et al [27], analytically modelled radiation for V-Trough applications, but with formulations that are over-simplified and not oriented towards a deeper step-by-step geometrical analysis.…”

Dual-Matrix Sampling for Scalable Translucent Material Rendering

“…Wang et al [37] proposed a system for real-time editing and relighting of homogeneous translucent materials. The approach proposed by Sheng et al [38] is also based on precomputation but focuses on the inter-reflection between translucent objects.…”

Method of Combining Spectrophotometer and Optical Imaging Equipment to Extract Optical Parameters for Material Rendering

“…Additionally, the optical parameters of a material are used for implementing cinematic rendering in the field of graphics [4][5][6][7]. The interreflections between objects and their environments and the subsurface scattering through the materials have to be considered to create realistic visual effects [8]. To do this, a prerequisite is to extract optical parameters that represent accurate optical properties.…”