Thanks for the clarification.
The culling is working fine, and is not related to what I was seeing.
But anything unexpected becomes suspect.
That particular problem was due to pathing going underground after
the last node was reached. Nothing to do with path nodes. FindBestZ
"corrected" the destination Z to deep underground. I changed the code
to use FindClosestZ, and the pathing was correct.
I'm not ready to recommend that change in general. I need to study a variety of scenarios before I'm confident that I understand what is happening.
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