Hi MackeyK24,
In case you haven’t run across them before, the Hermite splines Babylon has built-in are called Catmull-Rom splines. It doesn’t look like the we provide a way to directly specify velocity or extend to arbitrary dimensionality, but if what you’re looking to do is just smoothly interpolate through a set of 3D points, this should do the trick. Hope this helps, and best of luck!