VisualARQ only accepts one mapping value per object, so I just applied a box map to the wall objects themselves. Definitely agree about WCS Box Mapping! It would save many a nightmare. It would also allow us to use different mapping for the various objects, as you mention, that's not possible and requires you to adjust the UV repeat within the material settings.
Quote from Nvizeon
External Programs like Lumion render VisualARQ objects correctly I suspect because the transfer process makes extracted render meshes of the visualARQ elements.
As far as I've understood from the VisualARQ guys it's because Lumion and others use the updated API. The one that the Enscape team chose not to use because it wasn't as live editable.