• New adaptive mesh refinement (AMR) and unstructured tetrahedral volume types
• Dynamic load balancing is now implemented for the mpi_offload device
• Many improvements and fixes to the available path tracer materials
  • Specular lobe of OBJMaterial uses Blinn-Phong for more
    realistic highlights
  • Metal accepts spectral samples of complex refraction index
  • ThinGlass behaves consistent to Glass and can texture
    attenuation color
• Added Russian roulette termination to path tracer
• SciVis OBJMaterial accepts texture coordinate transformations
• Applications can now access depth information in MPI distributed uses of
  OSPRay (both mpi_offload and mpi_distributed devices)
• Many robustness fixes for both the mpi_offload and mpi_distributed
  devices through improvements to the mpi_common and mpi_maml
  infrastructure libraries
• Major sample app cleanups:
  • ospray_sg library is the new basis for building apps, which
    is a scenegraph implementation
  • Old (unused) libraries have been removed: miniSG, commandline,
    importer, loaders, and scripting
  • Some removed functionality (such as scripting) may be reintroduced in
    the new infrastructure later, though most features have
    remained and have been improved
  • Optional improved texture loading has been transitioned
    from ImageMagick to OpenImageIO
• Many cleanups, bug fixes, and improvements to ospray_common and
  other support libraries
• This will be the last release in which we support MSVC12
  (Visual Studio 2013). Future releases will require VS2015 or newer