For terrain, there is no message saying you can paint navmesh, we should see some brush feedback like painting terrain. Not good.
A good editor is when you don't need tutorials to use it , hwne most things are intuitive.
Navmesh on terrain requires you to paint in the areas you need as filling an entire terrain of navmesh is both a performance killer and memory killer.
Terrain means, whole terrain is playable. It's fast generation hand painting, why not automatic for simple terrain scale ?
work 3D engines works with navmesh generation and terrain
I think you means for very big terrains ? Let user decide or tweak parameters, but hand painted is bad solution for navmesh.
Don't want to hand paint each time terrain is modified or new gameplay is tested, nedd one button generation for terrain no hand painting
For very big terrains you can use small area real time navmesh generation around character.