Glad this is still helping people and that it continues to be expanded on (CMEX: I appreciate your frustration, but taking the ideas here as a start point and working out a solution to your requirements is still more helpful than burying the thread).
: I imagine you could add the next sections spline to a list and either jump to the next spline, or possibly renumber the spline points so they’re treated as next in line. Would be interested to see what you come up with. Can imagine it getting a little costly if it’s potentially endless though.
Maybe rather than completely locking the player to the spline, you could have multiple points on each one, and just take their positions/rotations and use leaps to smooth out the in-betweens (especially if it’s an automatic runner where you’ll know the speed of movement at all times rather than starting/stopping). It’s late and I’m just thinking out loud here so not sure it’d work.