Lumion has its own export cseen for 3dmax, just like D5 they do, the option is the extension according to the lumion library (New Part) which is divided specifically for objects, not just the default *.lib because each time lumion is opened quiet slow . slow due to library loading in *.Lib format?
export personal library typically used for lumion original saves (C:\Lumion\Lu24\ArchitectEdition\Project\LumionTrees_new) with extension *.llm ?
This makes the lumion library source richer, error checking thanks to export plugins from interactive software sources such as 3dmax, sketchup, revit…