Hi Paul,
I agreed with u. And thanks for your advance brief on Octane Revit workflow.
Since 3dsmax already interop with Revit very well in v2013 (e.g. sort object with material ID, with fbx technology in background), that's why I stressed Adsk material interop with Octane in Revit is very important.
Same for Navisworks, its very easy to sort imported Revit objects with material ID and reassign custom materials there.