Navmesh below ground and in air

[Sophie]

I am making my first navmesh, and I am having some trouble understanding how the placement of edges impacts the game's pathing logic.

1) If I position some vertices and edges in the air above the ground in a dungeon, will my NPCs look like they are floating? Do the vertices have to be exactly at ground level to prevent bad things from happening?

2) Sometimes I place two vertices so they are right on the ground, but there is a hump in the ground between them. So some sections of the edge between the two vertices disappears underneath the ground. Is this a bad thing? Will it block pathing?

3) I have tried using the "Set Pathing Test Attributes" popup. It seems to generate two shades of colors on the map - a dark one that is mostly in the room interiors, and a lighter shade that runs along the walls. In thin sections the dark can sometimes not be present. I'm having a hard time interpreting this. Can someone explain what I'm looking at? Does it have something to do with the Avoid nodes attributes "Node radius"? Do "underground" edges affect the shading?

Thanks!

[Corinze]

WOW - I have no idea what that green stuff is. Anything auto generated for navmesh in the CK should be avoided at all cost - lol.

Since you are doing your own custom dungeon I guess, I would just delete what you have and just start a new mesh manually. The first video I linked should be enough to do a simple room like that. All you need is the red triangles and yellow border, once the room is done, just finalize and close the nav tool and you should be good to go.

Just don't over think navmeshing, as long as it is continual with no broken links/boundaries and is on the ground, NPC will have no issues. Stuff like chairs, trees, houses, chest you want to nav around so they do not become trip hazards. At the same time the markers to sit, lay down need the mesh under them.
Mannequins, never but them on navmesh, this is one reason they walk around, always leave a big space around them.

[Sophie]

ty!