I am looking for any items that can shower a lot of particles into walls to light up the map. As stated in the title, I want to reveal the map 'legally', in a manner of speaking. Flying around the map to reveal the skybox is easy enough with some equipment, but revealing the underground sections can be a daunting task. I have figured out a method to do this with, but it's pretty tedious to do.

Looking it up online will bring up results of map viewers, but I want to play the game, not cheat my way through. Looking around for a solution for how to erase this fog blocking the map, one will find very scarce resources explaining how to do it.

When looking at a map of a Terrarian world, a lot if not most of the map is covered in black as a 'fog', as it were. Hello, everyone! I have a very specific question, so bear with me here.