Hi,
Thank you for the post. We are glad that you like FBX export : )
I’m not sure if I understand. There is option in model export dialog of FBX to export cameras together with image undistort to FBX. This way you will have all what you need in FBX = model, cameras, undistorted images … this must be perfectly aligned.
Did you know about this feature?
What is your workflow ( repro steps ).