Gradient Domain Renderer

Physically based gradient domain renderer with various other algorithms implemented alongside it. This is built over PBRT v-4

Features

1. Gradient Domain Rendering, with path reconnection

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2. Stochastic Lightcuts, with VPL generation for indirect lighting

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3. Gradient Domain Rendering with Stochastic Lightcuts Shiftmapping

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Building the code

As before, pbrt uses git submodules for a number of third-party libraries that it depends on. Therefore, be sure to use the --recursive flag when cloning the repository:

$ git clone --recursive https://github.com/mmp/pbrt-v4.git

If you accidentally clone pbrt without using --recursive (or to update the pbrt source tree after a new submodule has been added, run the following command to also fetch the dependencies:

$ git submodule update --init --recursive

pbrt uses cmake for its build system. Note that a release build is the default; provide -DCMAKE_BUILD_TYPE=Debug to cmake for a debug build.

pbrt should build on any system that has C++ compiler with support for C++17; we have verified that it builds on Ubuntu 20.04, MacOS 10.14, and Windows 10. We welcome PRs that fix any issues that prevent it from building on other systems.