Do you want to just be able to build it, perhaps with some modified sources? If yes, and you are on MacOS or Linux, I’d recommend you simply grab the source and supplemental files from here (https://www.radiance-online.org/download-install/radiance-source-code/latest-release), and use the
makeall script that comes with it. (
If you want to have your own go at it, or are building for Windows, I recommend you use the CMake build system that’s integrated with the source. It’s not great, but we are working on it as I type this. You’d need to get Qt, libtiff, X11 (*nix) libs all set up ahead of time.