Navmesh Obstacle shape

I want to know whether there are other shape Navmesh Obstacle.

Cylindrical have many limitations in actual use. Especially as the dynamic creation a fence in game, cylindrical Navmesh Obstacle cannot rotate down to horizontally, also cannot change his shape. Do not know if there are other ways to solve this problem?

For example, I thought in the game to create a rectangular collision barrier that like fence or fence

Only solution I found to this was to generate several empty objects with NavMeshObstacles of smaller sizes that slightly overlap, and add these as a child element to my objects. Seems to work wonders for my doors.