I’ve noticed some strange behavior of the recast graph when scanning terrain.
In this first screenshot, there is a gap along the contour of the hill even though I’ve turned the max slope way up.
And in this shot, we see the first problem I came across. Our terrain is large so we split it into separate adjacent terrain files, but recast always puts a gap between them, unlike colliders which it can connect.
Also, part of the blue navmesh is slightly below the terrain, but I don’t know if that is a significant problem.