Classic: Real-Time Ray Tracing: Holy Grail or Fool's Errand?
This article by Deano Calver, former Lead Programmer for Heavenly Sword, was published in October 2007 as a counter to the raytracing hype sponsored by Intel that was going on at the time. It also spawned an extremely interesting discussion thread on the matter (which was lost in a database failure but revived almost completely with the help of the community).

