In my situation I’m trying to make similar controls to how the Sparrow vehicle works in Destiny–the camera lags movement behind the vehicle but the forward/backwards movement doesn’t lag as much as the side to side movement so I had to find a way of controlling them separately. In this situation the vehicle is using physics to control movement and then the camera is on a spring arm that’s attached to the root, and then the lag blueprint is applied to the root to lag behind the vehicle.
I had tested a bunch of different ways to try it, including Relative Transform, but couldn’t get them to work. I think the relative position of the Root is at world coordinates anyway.
Anyways, the result is super smooth, very fun. Though I discovered it runs much smoother without the Blueprint open for some reason, had to adjust my interpolation speeds for that.