A C++ Microfacet BRDF Fitting and Rendering Library
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Jonathan Dupuy
Jonathan Dupuy added a quick hack to reproduce my EGSR fits (the original implementa…
…tion had a bug in the fresnel fitting that undersampled the input materials, so I just reproduced that)
Latest commit d3c1c29 May 3, 2017


This repository contains the source code used to produce the results of my PhD 
Thesis "Photorealistic Rendering with Microfacet Theory", which is available 
here: https://hal.archives-ouvertes.fr/tel-01291974
For more information on how to use the library, see the dj_brdf.h file. For 
users familiar with the Mitsuba renderer, looking at the plugins in the mitsuba/ 
folder shoud also be useful.

Here's a quick list of features
- Implements microfacet BRDFs based on the Smith shadowing model
- Full control over elliptic anisotropy
- Support for sampling with the distribution of visible normals for Beckmann
  and GGX distributions
- Support for LEAN/LEADR mapping
- Support for MERL and UTIA fitting with power iterations
- Added C++ tools to create LEAN/LEADR maps from displacement maps and normal 
  maps (see utils/ folder)
- Support for loading and rendering SGD and ABC BRDF models
- Support for loading and rendering of MERL and UTIA datasets

Those who wish to get the code to reproduce the results from my EGSR 2015 
paper entitled "Extracting Microfacet-based BRDF Parameters from Arbitrary 
Materials with Power Iterations" should clone the esgr_2015 branch.