5 papers
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…