NavMesh Static Off? Or NavMesh Static on and Not Walkable?

Hello there, I usually don't use the NavMesh system, so I'm a little confused about the most efficient way to proceed.

I have a city scene, and it has hydrants and lampposts, etc.

My question is, for these items, should I mark them NavMesh Static Not Walkable? Or should I just turn off NavMesh static alltogether?

For example these street lamps are the kind that are "T" shaped. So if I mark them not walkable, will that make it so my character can't walk under the hanging parts of the street lamp?

Thanks for your time.

 

• Not marking as 'navigation static' basically means they'll be 'invisible' for NavMesh purposes - as if they didn't exist.

• Marking as : 'navigation static' + 'Not Walkable' means they'll affect the NavMesh generation - and for your lamps, create holes in the NavMesh

• Regarding the T shape: It will block the movement - if the height of the cross-bar is lower than the Agent Height in the bake-settings window/tab - otherwise it will not.