Multilevel in 3.2.5.1

Iam trying to have a Ground over a Ground, I mean that I have multiple levels over each other…
But it doesnt work. The ground at the top overwrites the nodes from the next level under the top level. But I need it, because I have houses with a higher ground than the other …

Hi

This is a A* Pathfinding Project Pro feature.
In the pro version you can use layered grid graphs or recast graphs for multilayered environments.

You can use the navmesh graph in the free version, but then you will have to build your navmeshes manually.