Wenzel Jakob delivered a keynote speech titled Differentiable Simulation of Light: Why it is Important, and What Makes it Hard! at High Performance Graphics (HPG 2020). A recording of the event is available here.
Our paper on Radiative Backpropagation (with Merlin Nimier-David, Sébastien Speierer, and Benoît Ruiz) is now online. It re-casts the propagation of gradients through a rendering algorithm as another kind of rendering problem, fixing the “memory explosion” problem of current differentiable rendering approaches that differentiate simulations by recording a computation graph.
The second project on Specular Manifold Sampling (with Tizian Zeltner and Iliyan Georgiev) proposes a simple and general scheme for finding specular light paths involving complex geometry. It handles rendering of glints and caustics within a unified framework and can be used in standard Monte Carlo path tracers.
The third is a collaboration with KAIST & MSRA involving Seung-Hwan Baek, Tizian Zeltner, Hyun Jin Ku, Inseung Hwang, Xin Tong, and Min Kim. We’ve put together the first comprehensive database of BRDF measurements that captures changes in polarization state of light. Polarization reveals a wealth of information about an object's material/geometry, and this datasets improves our understanding of the behavior of real-world materials.
Three of our papers were accepted to SIGGRAPH 2020: one on differentiable rendering, one on glints & caustics, and one on polarized material acquisition. More details will be released soon!
Merlin Nimier-David was awarded a prestigious Facebook fellowship! Congratulations, Merlin!
Following more than three years of development, we have released Mitsuba 2, a new generation of our physically-based renderer. Mitsuba 2 enables a multitude of new applications building its support for inverse and differentiable rendering, GPU ray tracing, and spectro-polarimetric simulation.
Sébastien Speierer joins RGL as a Research Engineer. Sébastien will work on the ClearSpace 1 mission and will lead Mitsuba 2 development related to this project.
RGL will present two papers at SIGGRAPH Asia 2019 that together make up Mitsuba 2, our new fully differentiable, vectorized, spectral, and polarized renderer. The first paper (with Merlin Nimier-David, Delio Vicini, Tizian Zeltner, and Wenzel Jakob) explains the system, which begins to look more and more like a compiler. See “Mitsuba 2: A Retargetable Forward and Inverse Renderer” for details.
..the second (with Guillaume Loubet, Nicolas Holzschuch, and Wenzel Jakob) introduces a new way of differentiating visibility-induced discontinuities. This is a crucial component when optimizing shapes using a differentiable renderer. See “Reparameterizing discontinuous integrands for differentiable rendering” for details.
EPFL created a video about our ongoing work to capture the world of materials. Check it out here.
Wenzel Jakob received the Significant New Researcher Award at this year's SIGGRAPH conference.
Our paper on learning shape-adaptive subsurface scattering distributions (aka BSSRDFs) was accepted to SIGGRAPH 2019. Joint work with Delio Vicini, Vladlen Koltun, and Wenzel Jakob.
RGL welcomes Ibón Guillén from the University of Zaragoza, who is visiting for a three-month stay.
Two of our papers were conditionally accepted to EG 2019: A Low-Dimensional Function Space for Efficient Spectral Upsampling by Wenzel Jakob and Johannes Hanika, and Neural BTF Compression and Interpolation by Gilles Rainer, Wenzel Jakob, Abhijeet Ghosh, and Tim Weyrich.
We've created an interactive webpage that provides access to a comprehensive material database acquired as part of the project An Adaptive Parameterization for Efficient Material Acquisition and Rendering by Jonathan Dupuy and Wenzel Jakob.
Guillaume Loubet joined RGL today with a prestigious EPFL-INRIA postdoc fellowship. Welcome, Guillaume!
We've just released a free online edition of the Physically Based Rendering book! It features hyperlinked cross-referencing, beautiful SVG figures and equations as well as interactive image comparisons. The details of how all of this came to be are explained in the preface to the online edition.
Wenzel Jakob will present some of RGL's ongoing work on material modeling at FMX 2018.
EDIC Fellows Merlin Nimier-David and Delio Vicini join RGL for semester projects.
David Körner, PhD student at VISUS Stuttgart, is joining RGL for project this Summer & Fall. Welcome, David!
Wenzel Jakob will give a keynote talk at EPFL's 2017 Research Day Frontiers of Visual Computing on June 8.
This semester, a new version of the course CS 440: Advanced Computer Graphics is offered for the first time.
The third edition of Physically Based Rendering: From Theory to Implementation by Matt Pharr, Wenzel Jakob, and Greg Humphreys is hot off the press and should be available in stores mid-November. Elsevier and Amazon's stores have digital PDF & Kindle editions that are available as of now.
Chaos Group has released a new version of their V-Ray renderer, which for the first time includes a Stochastic Microflake reflectance model for rendering glitter and sparkle effects. Their algorithm is based on the paper Discrete Stochastic Microfacet Models by Wenzel Jakob, Miloš Hašan, Ling-Qi Yan, Jason Lawrence, Ravi Ramamoorthi, and Steve Marschner.
The course CS 328: Numerical Methods for Visual Computing is offered for the first time.
Call for presentations: please get in touch to present in the Fall 2016 edition of the Visual Computing Seminar.
EDIC Fellows Tizian Zeltner, Michalina Pacholska, and Andreas Finke join RGL for semester projects.
Wenzel Jakob receives the Eurographics Young Researcher Award.
Wenzel Jakob joins EPFL's School of Computer and Communication Sciences as a Tenure-Track Assistant Professor.