NavMesh, why are objects cut out of the mesh so badly?

Question

Unity

Hello.
Old problem, is there a way to solve it?
Let's say there are two houses:

When baking the grid, they should be cut out of it, but that doesn't work! Either the object is not cut out at all, or it is cut out partially.

I tried different options:
- standard nav mesh
- external component (from gita) nav mesh (I tried both mesh baking and collider baking).

As I understand it, this is because the bottom of the houses is cut out (for optimization, they cannot be entered).

Answer 1

As far as I know, NavMesh does not use a collider for baking, but the object's Mesh itself, so if one of the houses has no bottom, it ignores it. In this case, the only solution is to put a box the size of the house and with Static turned on. In principle, there is nothing wrong with this, sometimes it is even better - in the case of a complex mesh for a mesh. Given that it takes a fraction of a second, why not use this workaround?