Navigating Shortest Paths Through Three-Dimensional Space

The shortest path via routes serves only as a surrogate for approximate distance, and does not imply you’ll be able to pass through the Volumes along the way for a pit stop: the quickest journey between two Volumes in three-dimensional space will rarely pass through any known territory.

If you want to hit an interstitial Volume on the way, you’ll need to split your trip into two smaller journeys.