NavMeshAgent built-in obstacle

NavMeshAgent has similar thing like cylindrical obstacle. However, NavMeshAgent has no option to do "carving" in case than I want that it would affect paths for other units. I tried to use both NavMeshAgent and obstacle, however, there are warning that these two components can give unexpected behaviour. How I could solve this situation then I want that each unit would carve holes and also would be able to move along its own path?

 

Whats stopping you placing the carving object on a child or such?

 

Hi chanfort,
here you can see my try to fix the similar problem.. but it makes another one. :/

http://forum.unity3d.com/threads/nav-mesh-avoidance.305866/

 

Ahh, I kind of tweaked this one out. But I faced another one, that many agents are getting stuck in cases like this:
http://forum.unity3d.com/threads/stuck-zones-for-navmeshagent-and-obstacles.312886/