I'm working on Thaumcraft 4.0 research, and I can't seem to pin down what exactly it will accept as a "connected" research node. I know there has to be a straight line path between research nodes, but how far away can they be? Ideally, the more I can save on research points by maximizing the efficiency of as few research aspects as possible, the better.
A chain cannot form if there is more than one open space between active runes or nodes.
More info at the Wiki: Thaumcraft 4 Crafting
This is how it should look like.