This is my reference. notice that black navcut box.
Evernote_2018-10-03_23-11-03.png 127.35KB 0 downloads
this is my object. i know that bounding box of the upper platform will override the lower navmesh, so i place a navcut box to cut it separate.
but it seem to useless. npc can't enter the "red" area. that area (lower platform) is navmeshed, and test is fine.
so my question: why that navcut box isn't work?