Hi there !
I am (again) ! Everything works perfectly now, I can build the whole project, so thanks very much indeed !
I have a small issue with one of my fishes : It’s been created using Maya and the bones are OK but it’s not facing correctly : when using Orientation = Path in Itween, it does work, but the fish moves toward its side, like it’s surfing (or is drunk, which is pretty cool but definitely not correct !). I usually correct that with reimporting the mesh and skelleton and use the “rotation option” when importing. But on that particular fish, the skelleton root seems to be offset with the mesh root and rotating at import completely messes the animation (the fish now looks like it’s been run over by a car, which is quite less cool than previously, but still quite fun).
My question is : is it possible to rotate that actor by 90° and then to use the MoveActorToSplinePoint with Orientation = Path to make sure the fish faces the spline (with its nose, not its bum)? I’ve seen the “constrain rotation” node in the iTween lib, can that help me? Do you have something in mind?
Thanks a lot again 
Take care,
F