Did you tick the box to 'Rebuild Model for Each Frame' in the fly-through/sun-study options?
If you did and that didn't work then objects can be scripted to react to the camera frame number.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11