Vertical Navmesh

Is there a way to create vertical navmesh for simple flying?

I have a 2D game with flying enemies, that I need to avoid obstacles and fly through the level. So technically its not flying since its not 3D space, its just rotated normal navmesh.

Any help appreciated,
Crispy

No, thats not supported.
But there is a free 3d path finding plugin on the market place