Drone Vertical 3D Navigation

Godot Version

4.3

Question

I am currently trying to make a drone in my game that will assist the player. I want that drone to navigate in all three axes: x, y, and z. I am trying to use the NavigationRegion3D and the NavigationAgent3D to do this. Navigation in the x and z axes works fine, but navigation on the y-axis doesn’t work.
I think the reason for this is that in my game I currently have a flat ground and when I bake the NavigationMesh, it just makes a plane on the x and z axes. Because of this, I think the NavigationAgent3D doesn’t know that my drone can go up and down on the y-axis also.
Is there any way around this issue?