import those into SketchUp to particular layers/tags, then xref these sub-files (per building babsis usually) into a master file. It means we can have multiple artists working on the various sub-files, while the head artist works within the master setting up cameras, getting the lighting right... all the good stuff.
How are you doing this? Sketchup doesn't have a referencing system?
Lastly - how are you importing your Revit files?
We use the Sketchup exporter plugin from Simlab Soft when going from both Revit and 3ds Max for this task. It's very, very good (though it only brings through standard materials from max, not vray)
Great work, has got me inspired for our next job with Enscape.