The mapping problems are probably related to the fact that the FBX export from a Revit model used to be in inches, but I think they solved this in the later versions.
Yes I’m pretty positive that you can specify the import units and have it convert to whatever you like. The importer is way better in 2014+.
I didn’t spend any time diagnosing it, but it seemed like the Revit walls imported into Max inherited one color from the wall style, then ignored the rest of the wall finishes/maps. Actual texture mapping (scale, etc.) - I don’t believe that was a problem. I don’t mean to get off topic from the OP, but I attached an image just for reference. This was a remodel of a restaurant (pretty easy to guess which brand) modeled in Revit (don’t laugh, I’m a total Revit newbie), then simply exported and (very) quickly enhanced a bit in Photoshop.
My hope is that we can get print quality 3D rendering output from Revit with reasonable rendering times, without continually having to rely on the cloud and always having to buy more credits. That way we can continue modeling in Revit for CDs, generate color 2D elevations to locate artwork for our installers, and render out 3D print quality images straight from Revit for client approval of artwork placement, finishes, etc…
I think AD want’s you to export out of Revit as an FBX and import it into MAX. Sometimes people want to do too much inside of Revit. I think you can only go so far at which time you have to move your model over to a beefier solution, like MAX.