July 19, 2012, 12:02:17 pm
Not all materials are available via RevitAPI. We are doing our best, but it is sometimes impossible (take a look in build-in FBX exporter).
Anyway improving materials export is now our main goal, and I hope it will be better and better.
BTW: Creating small list of advices how to make materials in Revit for Lumion is great idea.