Ley Lines are the Essence version... I won't bother going into the other types of magic since you seem to be asking about essence. Although, Arcane is defined as a combination of them in some books.
Is this how you defined Ley Lines in your world, or how the rules described them? As I recall, it was Primal Essence, which is all three power types combined, as mentioned in the Arcane Companion (though I could be mistaken). And actually, I would love to hear how you addressed the Mentalism and Channeling counterparts to Essence-only Ley Lines
My campaign has an 'Arthurian' feel to it and as such places an emphasis on lakes being a source of power. With a little tweaking I have re-designed lakes as the 'Nodes' and rivers as the 'Lay Lines'... I have also added local gods at each Node (Lake) aka Ladies of the Lake.
This is a very interesting approach. I've often made the comparison of Ley Lines/Nodes to rivers/lakes, but never thought to combine the two. I used water as a model to determine how power would flow in lines across the world and collect in some places, but the best I could come up with was an incomplete concept where it flows from the north pole to the south, and then re-emanates from the north (kind of like magnetic lines of flux). But I still didn't know what sort of obstacles would redirect these lines, disrupting it's natural symmetry and ultimately creating nodes :/
I like the local gods concept as well. Reminds me of the Japanese traditional belief in local deities. Each would have their own lake, mountain, forest, etc.
So with Power Perception and being close enough you could follow a lay line until you found a new nexus. (hopefully uninhabited)
Only after RoCo 1 did we consider actually traveling through the lay lines at all.
Travelling through a lay line? And what would you do with an uninhabited nexus if you found one?
Thanks for the replies guys!