This library like my original povwriter library exports the processing sketch as a PovRAY SDL, then povray does the raytracing, if you use povray-3.7beta (currently RC-6) then it is multithreaded so you can make use of your multicore processor.  Although this version of the library is not currently available for auto-download, I have change the distribution to be a single download, with one the sample files Install.pde to install required template files and to set the path to povray.