Mesh along spline disappears

[Mandrake1983]

Hi. I made a simple train which follows a spline. My problem is that when I launch the animation, train starts and one minute after it disappears. I made a timeline to make train run along the spline for 10 minutes but I can’t undestand why it disappears after just a minute.
Can you help me?

[Mandrake1983]

Edit
If I follow the train with my player character, the train with it’s carriages disappears except one wagon which continues to run along the spline. If i see the train which starts without follow it, I can see it go very far away.

[Leomerya12]

Thanks for the video!

Can you post a screenshot of your Spline BP?

[Mandrake1983]

[Mandrake1983]

Any idea?

[Leomerya12]

You didn’t respond (using “reply”) or tag me, so I got no indication that you reposted.

I’ve never encountered this, so I did a bit of digging.

Apparently (at least, in the past), meshes could disappear along the Z (Up/Down) axis. And seeing as your train ascends, this could be the case.

What version of Unreal are you on?

Spline mesh disappears when aligned on z axis

(Continued) If you translate x or y even fractionally away from [0,0] (say, [0,0.00001] then the mesh will reappear. Now more fundamentally, the issue appears to be just the spline mesh and there is no relation to the spline itself. The construction diagram can be reduced to just the Add Spline Mesh Component, and Set Start and End. Set the Start Pos at [0,0,0], Start Tangent [0,0,0], End Pos [0,0,100], and End Tangent [0,0,0]. Again the mesh will disappear. For more reasonable tangents, y…

[Mandrake1983]

Hi, thank you and sorry for my mistakes.
I solved myself. It was a problem of world partition which didn’t load all actors.