- Support for Revit lights, including IES
- Support for many built-in Revit materials
- Ability to override scene materials with MXM files
- Maxwell Grass
- Multilight read back: changes made to lights in Multilight can be imported back into the Revit scene
- Easy access to the Maxwell material library and gallery from inside the Revit UI
There's more information available on the Maxwell Render website.
See other rendering-related add-ins here.
Via: Luke Johnson's What Revit Wants blog.