How do you "optimize' it? You would think with so many game companies using it that if there was a better way than there would be at least one title with optimized ray tracing. The issue is the computational requirements for convincing ray tracing. When Toy Story 1 was rendered originally it took 45 minutes to 3 hours to render a single frame of video. Give it time and the GPUs will eventually be fast enough. Baby steps with new tech.