== Problems you encountered with the pbrt build/installation process? == I installed pbrt on Mac OS X, running on MacBook Pro (Intel). The process was pretty easy. In addition to OpenExr, I had to install libtiff (using Fink). After that everything compiled and installed smoothly. == How did you speed up the render-view results-render again process? == I used lower resolution (300x300) and Sampler values (1) for quick turn-around during testing. == What other experimentation did you do in this project? (include any cool images you made on the wiki page) ==