• New future proof API with a strong focus on supporting dynamic scenes
• Lots of optimizations for 8-wide AVX2 (Haswell architecture)
• Automatic runtime code selection for SSE, AVX, and AVX2
• Support for user-defined geometry
• New and improved BVH builders:
  • Fast adaptive Morton code-based builder (without SAH-based top-level rebuild)
  • Both the SAH and Morton code-based builders got faster (Xeon Phi)
  • New variant of the SAH-based builder using triangle pre-splits (Xeon Phi)