I did find out what the problem was, and it did first happen in 2023 on Mac, but not until 2024 on Windows. I logged a bug report about the problem. SKOR-19255 in our system.
What is happening is that the complex geometry on hidden tags are still affecting performance. In 2022 on Mac or Windows, you can have a very demanding scene that orbits slowly, but if you hid the tags that include complex terrain, for example, the remaining visible model orbits smoothly. In 2023 and 2024 on Mac, and 2024 on Windows, the model still performs nearly as badly as if the hidden tags were still showing.
Here is a screen recording of a lamp being orbited, where there is still a hidden tag with lots of terrain on it:
In 2022, that would have orbited smoothly. Here is the same model, only I deleted the hidden tag, and its contents:
The reason it becomes smoother if you are on parallel projection, is because even the hidden tag contents are rendered super fast, and so don’t cause a problem.
For the importing the DAE case, I tried that in 2017, 2021, 2023, and 2024. All of them show poor performance when in Perspective. I did find that how much slower perspective was than parallel projection depended on where you had zoomed in and out from. I was able to get as much slowness in 2023 as in 2024.
Two odd things, that I will check into: 1. Sometimes the orbiting becomes very smooth, it would be good to know why that view is smooth, but a slight orbit away from that direction then becomes jerky. 2. Even when orbited to a smoother looking direction, zoom is jerky. Why is it zoom can’t be as smooth as orbit?
I will try to show the developers what I mean, and see if they can explain the behavior.