Wow, impressive work at that link. I have not read it but content seems to be great!
How did you find it?
I can program c++, have edited some engine plugins form marketplace and made some base classes. But most of the time I use BP, it’s easier for me. Yes, the UE4 market place could habe a solution. I saw a solution for walking on walls with spiders already. Could be something for you.
I thought about changes needed on built in navlinks. I think the solution do not have to be ultra generic. Perhaps I can modify engine code. I think it would be totally suitable when the nav link do not link two single points, but have a box volume on both ends, like a trigger box. And on both ends you could scale the volumes bigger, and everything of the navmesh which is in the navlink will be links. Of course this algorithm has to be somewhere in “ai pathfinding” itself also. That would be great and you could simply link long ledges dynamically with such a technique.
Just as idea, I think in my first shot I will stick with nav links.