How to add navigation to a mesh?

Development World Creation
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1

When I use a stair BSP, the navigation automatically adds onto the stairs going up, however when I try to do this with a static mesh stair, it doesn’t.

Could someone point me in the right direction to get this working?

Thanks!

2

I needed to add collision to the mesh for navmesh to get set

3

I needed to add collision to the mesh for navmesh to get set