Lumion 7.3 released with a focus on workflow with Revit and Lumion though LiveSync.
With LiveSync, user can link their Revit model with Lumion allowing for instant updating between changes. This opens up to opportunity to get early designs into Lumion sooner, and help refine the design process through early iteration.
The Revit add-in can be found here.
https://lumion3d.com/revit-exporters....
For more information about Lumion, go to Lumion.com