I've created a blueprint using the blueprint rune, and when I go to place it, I want it to snap to another existing structure. I have tried creating the blueprint with and without snap points, but it still won't snap correctly, wanting to snap an existing 2m horizontal beam to the middle of the planned 1m vertical beam, instead of snapping the vertical beam to the bottom of the horizontal beam (extending a fence).



I've got to be doing something wrong. Any ideas, or will pictures help?