Hi Sam
Im not trying to use AE to edit the sequence – I am compositing a scene that has already been edited by our offline editor. The catch is that it’s a fight scene, so it has lots and lots of cuts (there are nearly 100 shots in a 2 minute sequene). My usual workflow of compositing and rendering each shot seperately to reassemble in FCP gets bogged down in this situation. Also, I need to see the flow of each shot running back to back, as the look is quite stylized and it is important check the consistency of motion.
There are more practical problems of pre-composing each shot, as I have layers parented to null objects in order to provide consistent camera shake between all layers. If I break up the parenting by pre-composing, I lose the ability to tweak this without it getting very complex.
I think I may try what Kevin suggsted with the “force motion blur” filter- Ive not used it before so wasnt sure how it worked.