Hi, I found 2 problems with he export plugin from Revit 2018 to ATL 6.5, or at least for me are problemas.
1.- The plugin do not export correctly the split face elements, even when they have different Materials.
2.- When a element is separate in parts, and divide, the pluging export both geometry, instead of « Only parts », it have as deafault « Both ».
Hope, find a solution beacause divide an existin model to multiple slabs, walls, etc, its not the correct proccess (it`s the longer).