1. Here's how
1.1: Import your model in Lumion and use the Mark as terrain function (even if the model includes buildings). This ensures that the Set Eye Level at 1.60 function (as below) will work:
Context Menu -> Click on the Object Icon -> Extra -> Mark as terrain -> On
1.2: Set eye level at 1.60: In Movie Mode, edit the camera animation of a Clip and click on the Set eye level at 1.60 button. This will place the camera 1.60m above your Imported Model that you marked as a terrain. If you did not mark any models as a terrain, the camera will be placed 1.60m above the native Lumion Terrain:
1.3: Adjust the camera height by clicking on the Camera up and Camera down buttons:
1.4: Click on the Take Photo button to save the camera keyframe:
1.5: Repeat the steps above to add additional camera keyframes to the Clip.