You're welcome! Scratchapixel was new to me, so thanks for that link. PBRT (which you already have) is definitely a favorite. You also cited Graphics Gems IV

You're welcome! Scratchapixel was new to me, so thanks for that link. PBRT (which you already have) is definitely a favorite. You also cited Graphics Gems IV but I enjoy dipping into all of them. Other suggestions: * http://tog.acm.org/resources/RTNews/html/ http://tog.acm.org/resources/RTNews/html/ (Somewhat dead, but the archives are great) * http://ompf2.com/ http://ompf2.com/ (Active, lots of ray tracing specific discussion) * http://www.realtimerendering.com/ http://www.realtimerendering.com/ (I'm fond of the book as well) * http://kesen.realtimerendering.com/ http://kesen.realtimerendering.com/ (Especially the sections for "Symposium on Interactive Ray Tracing" and it's successor, "High Performance Graphics") If I had to pick one, though, it'd be PBRT since it's a unified work that starts from the ground up.