When a model is too far from the World Origin in the space of the 3D software, it might/may not import in Lumion. If it does import, it will be almost impossible to see/find if it's located outside the 2x2 km area.
Reference: Zendesk Support Request
There are cases in AutoCAD/Revit/ArchiCAD/Vectorworks etc when users draw their 3D model in a different location from other 2D elements. In some cases, the position of the 2D elements will be exported (although the elements themselves will not) and the model will be placed in a large bounding box. In cases as such, there are 2 options:
1 - delete the 2D (invisible) parts and export only the 3D model
2 - bring the 2D (invisible) parts closer to the 3D model so the bounding box is not that far away
Reference: Zendesk Support Request
Notes:
This article is [Work in Progress] and will remain that way given that issues will be added whenever we come across a notable one.