How to make objects walk off edge of navmesh and fall?

Hi! I'm working on a game where I would like an object to be able to walk off the edge of a navmesh and fall. Is there a way to do this without using a higher step range?

 

Hmmm, not really an "intended" way for this. The NavMesh is built specifically so agents can't just leave it.
You basically would need to "fool" the NavMesh into thinking it's bigger than the edges of your surface.
Perhaps what you could do, is create invisible colliders around every edge of the navmesh, include these in your bake and then when your agent walks over them, disable the agent and enable physics on the agen'ts rigidbody while turning the invisible colliders off.
This might cause some trouble if you'd re-enable the NavMeshAgent afterwards though, for example having them land on another platform. Something to try out.

 

In bake settings in the navigation window you can click on your agent and change a value called Drop Height.