I'm not entirely sure if this is a recent feature or a bug, but the AI Navigation test sector in Bractus P1 is full of cool blue lines which I think are very pretty :)

Apparently these lines are part of what is being tested - quoting Incarnate:

It's a visual display of available path nodes

They will change position and create new nodes and paths if you linger in sectors that the display is turned on for.

Definitely not a bug. That's what the test-sector is actually.. testing.

I also wrote about it on Facebook and Twitter back in January.