"3Delight for 3ds Max is a fully integrated rendering plug-in for Autodesk® 3ds Max® 3D Animation Software. It achieve seamless integration into 3ds Max."

The most important benefits are:

  • Simple yet powerful feature set.  A departure from currently available solutions.
  • Multi-Light feature and Light Mixer for interactive, real-time, re-lighting. Multi-Light output includes separate channels for both environment and incandescence.
  • Multi-channel EXR and Deep EXR (EXR 2.0) support for tight integration in compositing software such as Nuke.
  • Out-of-the-box support for OpenVDB and Massive.
  • Robust support for AOVs with an intuitive UI and workflow.
  • Seamless rendering of Motion Blur and Depth of Field without the usual extreme slowdowns and quality issues.
  • 3Delight's high-quality rendering of fine displacements and infinitely smooth subdivion surfaces.
  • Rendering doesn't freeze 3ds Max user interface.

and more!!

For info: http://www.3delight.com/en/index.php?page=3DFMax_overview