NavMesh not generated in some areas


I am testing with Epic OpenWorld demo and trying to generate NavMesh on the platform. But in some areas, NavMesh can’t be generated, you can see “holes” on the ground.

I have tried to tweak the parameters of the RecastNavMesh object, see the parameters below, but couldn’t figure out how to fix this issue.


I would appreciate it if anyone can give me some advice about it.

Thanks in advance!

It looks like the navmesh is correctly generating. The holes you see are there because at those spots the navmesh is just below the terrain rather than just above it. Try increasing the Draw offset param in Project Settings → Engine - NavigationMesh.