#navmesh

On engine 26.07 both [GameResource] and NavMesh.GetSimplePath are marked [Obsolete] (CS0618), so a zero-warnings build gate fails on them. Replace [GameResource(...)] with [AssetType(...)] and GetSimplePath with NavMesh.CalculatePath, which returns a NavMeshPath of NavMeshPathPoint (not List<Vector3>).

A baked navmesh is a cached derived copy of the world, so a door leaf that swings clear in physics leaves the doorway solid on the navmesh until you regenerate the tile.

The navmesh voxeliser erodes walkable surfaces by ceil(agentRadius/cellSize) whole cells on each side, so an opening narrower than that budget has no navmesh through it.