14 citations · 46 across the 12 of their papers we have counts for
12 papers · 1 filter
The Minimal Retroreflective Microfacet Model
Jamie Portsmouth, Matthias Raab, Laurent Belcour +1
We present the Minimal Retroreflective Microfacet (MRM) model, which turns any existing microfacet BSDF into a physically plausible retroreflective one by a single substitution: re…
OpenPBR: Novel Features and Implementation Details
Jamie Portsmouth, Peter Kutz, Stephen Hill
OpenPBR is a physically based, standardized uber-shader developed for interoperable material authoring and rendering across VFX, animation, and design visualization workflows. This…
A Fluorescent Material Model for Non-Spectral Editing & Rendering
Belcour Laurent, Fichet Alban, Barla Pascal
Fluorescent materials are characterized by a spectral reradiation toward longer wavelengths. Recent work [Fichet et al. 2024] has shown that the rendering of fluorescence in a non-…
Non-Orthogonal Reduction for Rendering Fluorescent Materials in Non-Spectral Engines
Alban Fichet, Laurent Belcour, Pascal Barla
We propose a method to accurately handle fluorescence in a non-spectral (\eg, tristimulus) rendering engine, showcasing color-shifting and increased luminance effects. Core to our…
Transforming a Non-Differentiable Rasterizer into a Differentiable One with Stochastic Gradient Estimation
Thomas Deliot, Eric Heitz, Laurent Belcour
We show how to transform a non-differentiable rasterizer into a differentiable one with minimal engineering efforts and no external dependencies (no Pytorch/Tensorflow). We rely on…
Real-Time Rendering of Glinty Appearances using Distributed Binomial Laws on Anisotropic Grids
Deliot, Thomas, Belcour +1
In this work, we render in real-time glittery materials caused by discrete flakes on the surface. To achieve this, one has to count the number of flakes reflecting the light toward…
One-to-Many Spectral Upsampling of Reflectances and Transmittances
Laurent Belcour, Pacal Barla, Gael Guennebaud
Spectral rendering is essential for the production of physically-plausible synthetic images, but requires to introduce several changes in the content generation pipeline. In partic…
Iterative -(de)Blending: a Minimalist Deterministic Diffusion Model
Eric Heitz, Laurent Belcour, Thomas Chambon
We derive a minimalist but powerful deterministic denoising-diffusion model. While denoising diffusion has shown great success in many domains, its underlying theory remains largel…
A Data-Driven Paradigm for Precomputed Radiance Transfer
Laurent Belcour, Thomas Deliot, Wilhem Barbier +1
In this work, we explore a change of paradigm to build Precomputed Radiance Transfer (PRT) methods in a data-driven way. This paradigm shift allows us to alleviate the difficulties…
Rendering Layered Materials with Diffuse Interfaces
Héloïse de Dinechin, Laurent Belcour
In this work, we introduce a novel method to render, in real-time, Lambertian surfaces with a rough dieletric coating. We show that the appearance of such configurations is faithfu…
Lessons Learned and Improvements when Building Screen-Space Samplers with Blue-Noise Error Distribution
Laurent Belcour, Eric Heitz
Recent work has shown that the error of Monte-Carlo rendering is visually more acceptable when distributed as blue-noise in screen-space. Despite recent efforts, building a screen-…
Passing Multi-Channel Material Textures to a 3-Channel Loss
Thomas Chambon, Eric Heitz, Laurent Belcour
Our objective is to compute a textural loss that can be used to train texture generators with multiple material channels typically used for physically based rendering such as albed…