Thanks Jared, this approach worked for me.
you are completely correct: works OK in Standard (Draft) renderer, but hangs completely when Physical renderer plus bells & whistles are on.
I guess all AE needs is the position & attributes of the cameras and targets. Perhaps the “motion camera” has settings that are not compatible or necessary with AE.
thanks anyway, you saved another 2 hours of stress
Toby Hallam
3D Motion Graphics Designer
Cisco