Navmesh breaking in Terrain Hole

I’m currently making a map that uses multistory buildings that go below my terrain. I’ve cut holes in the terrain following this page’s directions: Landscape Materials | Unreal Engine Documentation

Everything works fine with my player character, however when i drop my navmesh in it breaks my paths in a weird way when it comes to the holes i cut.

I’ve tried using navmesh bounds volumes to try and “repair” the splits but it does not help.

Is there a way to fix this issue?

The issue is that even when you apply the transparency the terrain still exists in that location and the nav mesh will still bump into that. The only way i manged to “fix” the issue is to raise or lower the terrain until the nav dispalyed a solid green path.

Sorry, I should have come back to answer this while ago.

I’m having a similar problem. It appears Terrain still blocks the nav mesh even with terrain holes. The player can go through fine, but AI can not.

Any solutions?

Unfortunately I’m not able to do that due to the design of the level. I guess AI just won’t be crossing the terrain boundary for now.

Thanks for the reply!