As mentioned previously, while importing 3D models into Lumion, the process is very simple and most of the time you don't face any major issues. However, after the first few projects in Lumion, you will definitely learn how to avoid them.
These are the issues that will crop up because you are new to Lumion but with practice, these can be reduced to a minimum.
The first issue arises when you import the 3D model that is placed on the scene. The difficulty here is that you don't see the model immediately. Why? One of the reasons is that you didn't create the 3D model close to the origin axis.
The origin axis is the point where X=0, Y=0, and Z=0. Most of the 3D applications will represent this point ...