Blueprint first person template, not working with large terrain

Okay, so I built a landscape at the dimensions of 8129x8129 vertices, and 1024 components. When this is simply a flat plane, the blueprint first person template works fine when I click play.

However, I then used a height map generator (sourceforge) and imported the height map into UE4, and the terrain alters just fine. I can continue to edit the terrain, texture it, etc using the editor, however whenever I click play it either doesn’t work, or it starts for one second and then ends.

I tried again on another randomised terrain, in a different project (just using the template) however the same problem occurred again.

Is it not recommended to use a height map generator on such a large terrain, or is there another problem here?

Any help would be much appreciated. Thank you!

You are probably dropping below the Kill zone. Look at the map in side view and see where the red line is positioned. If it is above the terrain then change it to a lower value in world settings.

Also make sure that the height map is making a mesh with collision and not just letting objects pass thru it.

In your project folder in Saved there is a folder ‘Logs’, you could check in the last log where it crashed on.