How does one make a Big Dungeon Arena?

[RicktheSmugLord]

I am currently playing the Calamity Mod and I am constructing a HUGE Dungeon Arena to fight the Polterghast, though it seems that certain parts of the empty space is considered "Caverns" instead of "Dungeon", which was possibly why I kept on dying during the Fight over and over.
How might I construct a huge Dungeon Arena while having it keep the Dungeon Biome?

[Leeby Deeby]

Just make sure you cover the areas without walls with blocks so you don't stray into those areas. I find it best to look for two of those really large areas right next to each other.

[RicktheSmugLord]

Doesn't really work out much because the parts of the arena are awefully weird in terms of determing biomes.
Like for instance:
A small corner consist of a lot of dungeon blocks and walls and such yet is not considered a Dungeon, while another spot with little blocks is considered a dungeon.

[terraria8767]

you could build a bunch of dungeon bricks in the cavern areas and actuate them so they dont block your movement

[terraria8767]

İlk olarak terraria8767 tarafından gönderildi:

you could build a bunch of dungeon bricks in the cavern areas and actuate them so they dont block your movement

just realized this is 5 years old

[RicktheSmugLord]

İlk olarak terraria8767 tarafından gönderildi:

İlk olarak terraria8767 tarafından gönderildi:

you could build a bunch of dungeon bricks in the cavern areas and actuate them so they dont block your movement

just realized this is 5 years old

Is it? Holy crap how time flies.