Best practice for mass-object instancing along 100km spline (railways) plus streaming

[teamteam]

Where deos the problem happen? Is the imported spline wrong, or is the objects created along the spline wrong? If it is the later, try this (in the loop of the script I send you):

GameObject.Instantiate(GameObject, Spline.transform.TransformPosition(segment.Approximation[cachePointIndex], Quaternion.LookRotation(Spline.transform.TransformPosition(segment.ApproximationT[cachePointIndex])));

It should work. If not, please send me a simple example project so I can see what is wrong

Unfortunately it doesn't work. Here ist a little Unity project for you to understand the problem.

https://we.tl/t-WDsXdhP1WZ