1. I wonder what properties should be modified to be proportional to the size of UE content and the actual person.
2. Tracker is in use, but the delay is being modified by changing the attributes of tracker delay and camera delay.
However, I wonder how to set the delay value effectively because it doesn't seem to be working properly.
Hi,
You can set the Scene's scale here to resize your UE content:
But if your UE scene is based on real-world scales and distance, then it is unlikely you need to change this value.
If your tracking and camera's zoom are correctly calibrated then the billboards (actual persons) should be the same size in the virtual world as they are in the real world. More on billboards: https://aximmetry.com/learn/tutorials/for-studio-operators/setting-up-virtual-sets-with-tracked-cameras/#compositing-modes
The tracking and video delay is documented here: https://aximmetry.com/learn/tutorials/for-studio-operators/setting-up-virtual-sets-with-tracked-cameras/#inputs
In most cases, the tracking data arrives faster than the video and you don't need to change the video delay from the 0 value. You only need to set the tracking delay.
Warmest regards,