Filling holes

[Calen]

I have various underground arenas/farms which work well, but over time ghoulies collect in the holes around them. Filling them with stone/dirt is just laborious. I made the mistake of filling them with sand; at the surface this resulted in creating a desert biome, and underground if there is any corruption/crimson that hasn't been cleansed properly the sand results in accelerated spread of the world evil. (I corrupted part of my jungle this way - I hadn't noticed a tiny bit of corruption I'd missed, and without realising the sand spread the corruption to the jungle which proceeded for some time before I finally became aware.)

Is there an efficient way to fill holes (some of which are rather large - in excess of 1000 blocks - without risking evil spread? Or are background walls a better way?

 

[Sora_92]

How about dirt bombs? though I didn't really tested them.

Dirt itself is non-corruptible, as long as there's no grass on it.

 

[Calen]

I hadn't considered that, thank you. I'll have to experiment to see how good it is at filling completely.

 

[VenonUIO]

I've sometimes used the Bottomless Lava Bucket since it's always in my Money Trough and enemies can't spawn in lava. Obviously this is a contentious "solution" as it's a liquid and a harmful one at that, but the bucket fills up said holes/rooms extremely quickly and is an infinite resource so it's pretty useful, especially since I'm usually wearing Terraspark to mitigate some of the harm. It might look a bit out of place depending on what biome you're placing said lava in though.

 

[Calen]

That would work well in the lower cavern layer, though I probably wouldn't use it elsewhere. I use the drill mount a lot and I can foresee unexpected lava falls lol. Best get a lava sponge before using that.

Dirt bombs did the trick, but I'll definitely consider this lower down.