Position-Free Monte Carlo Simulation for Arbitrary Layered BSDFs

Yu Guo, Miloš Hašan, Shuang Zhao.

In ACM Transactions on Graphics (SIGGRAPH Asia 2018).

[Paper] [Code] [Supplemental Materials] [Poster] [Fastforward on Siggraph Asia 2018 (Video)(Slides)]
[Presentation on Siggraph Asia 2018 (Slides)] [Two Minute Papers]

Overview

This is a branch of the Mitsuba (0.6.0) renderer (official repo: https://github.com/mitsuba-renderer/mitsuba)

Install

Linux (Preferred, Tested on Ubuntu 16.04, 18.04)

• $ sudo apt update
• $ sudo apt upgrade
• $ sudo apt install git scons libboost-all-dev libpng-dev libjpeg-dev libopenexr-dev libxerces-c-dev libeigen3-dev libfftw3-dev libglewmx-dev freeglut3-dev
• $ git clone https://github.com/tflsguoyu/layeredbsdf.git
• $ cd layeredbsdf/
• $ mv config_linux.py config.py
• $ scons -j x (x = # of cpu cores)
• $ source setpath.sh Now you can render scenes
• $ mitsuba xxx.xml

Windows (Tested on Windows 10 x64)

• install visual studio 2017
• clone this git to local folder
• go to folder ..\layeredbsdf\
• rename config_windows.py to config.py
• download dependencies

Examples in paper (click image to download scene files)

Scene file (.xml) explanation

• <scene version="0.6.0"> (Here using 0.6.0, but not 0.5.0)
• <integrator type="path_layered"> (path_layered preferred, but can still use path, volpath or volpath_simple instead)
• <bsdf type="multilayered"> ... </bsdf> (BSDF type is multilayered, both our uni-dir and bi-dir methods are implemented here)

Notes

• Default precision in config.py is single. If you find too many warnings or even it is crashed when rendering scenes, you should try double precision instead. (Already provided in config.py)
• conductor and dielectric are not supported now, use roughconductor (a=0.001) and roughdielectric (a=0.001) instead.
• Welcome to report bugs and leave comments (Yu Guo: tflsguoyu@gmail.com)