Publication
Multilayer four-flux matrix model accounting for directional-diffuse light transfers
Related publications (32)
A Full-Wave Reference Simulator for Computing Surface Reflectance
Computing light reflection from rough surfaces is an important topic in computer graphics. Reflection models developed based on geometric optics fail to capture wave effects such as diffraction and interference, while existing models based on physical opti ...
ASSOC COMPUTING MACHINERY2023Efficient and Accurate Physically-Based Differentiable Rendering
Physically-based rendering algorithms generate photorealistic images of virtual scenes. By simulating light paths in a scene, complex physical effects such as shadows, reflections and volumetric scattering can be reproduced. Over the last decade, physicall ...
EPFL2022Modeling specular transmission of complex fenestration systems with data-driven BSDFs
A Bidirectional Scattering Distribution Function (BSDF) describes how light from each incident direction is scattered (reflected and transmitted) by a simple or composite surface, such as a window shade. Compact, tabular BSDFs may be derived via interpolat ...
2021Light Path Gradients for Forward and Inverse Rendering
Physically based rendering is a process for photorealistic digital image synthesis and one of the core problems in computer graphics. It involves simulating the light transport, i.e. the emission, propagation, and scattering of light through a virtual scen ...
EPFL2021A Non-Exponential Transmittance Model for Volumetric Scene Representations
Wenzel Alban Jakob, Delio Aleardo Vicini
We introduce a novel transmittance model to improve the volumetric representation of 3D scenes. The model can represent opaque surfaces in the volumetric light transport framework. Volumetric representations are useful for complex scenes, and become increa ...
ASSOC COMPUTING MACHINERY2021Path Replay Backpropagation: Differentiating Light Paths using Constant Memory and Linear Time
Wenzel Alban Jakob, Delio Aleardo Vicini, Sébastien Nicolas Speierer
Differentiable physically-based rendering has become an indispensable tool for solving inverse problems involving light. Most applications in this area jointly optimize a large set of scene parameters to minimize an objective function, in which case revers ...
ASSOC COMPUTING MACHINERY2021Practical Product Path Guiding Using Linearly Transformed Cosines
Path tracing is now the standard method used to generate realistic imagery in many domains, e.g., film, special effects, architecture etc. Path guiding has recently emerged as a powerful strategy to counter the notoriously long computation times required t ...
WILEY2020Specular Manifold Sampling for Rendering High-Frequency Caustics and Glints
Wenzel Alban Jakob, Tizian Lucien Zeltner
Scattering from specular surfaces produces complex optical effects that are frequently encountered in realistic scenes: intricate caustics due to focused reflection, multiple refraction, and high-frequency glints from specular microstructure. Yet, despite ...
ASSOC COMPUTING MACHINERY2020Image-Based Acquisition and Modeling of Polarimetric Reflectance
Wenzel Alban Jakob, Tizian Lucien Zeltner, Xin Tong
Realistic modeling of the bidirectional reflectance distribution function (BRDF) of scene objects is a vital prerequisite for any type of physically based rendering. In the last decades, the availability of databases containing real-world material measurem ...
ASSOC COMPUTING MACHINERY2020Slope-Space Integrals for Specular Next Event Estimation
Wenzel Alban Jakob, Tizian Lucien Zeltner, Guillaume Rémi Bruno Loubet
Monte Carlo light transport simulations often lack robustness in scenes containing specular or near-specular materials. Widely used uni- and bidirectional sampling strategies tend to find light paths involving such materials with insufficient probability, ...
ASSOC COMPUTING MACHINERY2020