Location/Name of Files Controlling UI Lot VFX?

Hello,

I am making a custom world; however, I am still very new to the processes.

Anyone know where I can find the data that encodes the blue bounding box that surrounds lots in the worldmap UI?

I suspect it is in the UI.package; however, I can only say for sure that it is not in a .world file.

Alternatively, anyone know a way to debug the game, so that I could get a dump of the package contents being pulled?

Thanks!