just of curiosity - do you model all in sketchup? or do you use some kind of connectivity to revit?
the reason i ask is, that we use revit, but i find that the lack of proxies in revit, reduces the possibilities, compared to what you have achieved with sketchup / enscape.
i would love to use sketchup / enscape as you do, but i could double my work if that means that i need to update two models all the time....
That is actually the exact same problem we have faced with our workflow here at the office. We haven't figured out the perfect workflow yet, but what we are doing at the moment is exporting the revit model (containing the building only), and merging it with the sketchup-model containing the terrain, proxies and all that extra stuff that way we can keep working on the building in revit, and when it is time to do high quality (updated) renders, we put the new export from revit in the same spot in sketchup as the old one... it is not perfect, but for now it will have to do... the quality we can achieve from revit alone simply isn't high enough for the clients we work with.