Should I care about world purity?

[jp]

New player here.

As title says, should I care about world purity? If it gets too corrupt, will it prevent any storyline events / quests?

I dont care about loosing biome, as that can always be purified latert and small jungle can be built, if need be.

[GhostyOsty]

Terraria has no story. It really doesn't matter.

[Alucard †]

Once Corruption / Crimson reaches your base it may render your housings too corrupted for NPCs to live if ther are too many affected blocks too close to your housings. After that they will move out and search for other suitable houses or become "homeless"

Once every single biome is destroyed you may not be able to do Angler's biome exclusive fishing quests. Get biome specific drops or fight some biome specific bosses without isntantly enraging them.

So it depends on how much you care tbh.
As most biomes are easy to recreate for purposes mentioned above.

[Necrius]

No, but it helps to keep variety in the world. Would be a shame if corruption/crimson killed your Jungle or left you with only corrupt/crimson deserts and snow biomes. Also NPCs don't live in evil biomes.

[Shinden]

just make sure your jungle doesnt get devoured until plantera is dead and you'll be ok.

[We are in the Beam]

No unless you care about keeping certain biomes for aesthetical purposes. NPCs will leave if the corupption/crimson reaches their house though. However you should isolate the jungle since the corruption/crimson/hallow will convert mud blocks into dirt blocks if they reach them.

[Zemecon]

Hallow will not do anything to the jungle. It only converts normal and other hazardous biomes in hardmode. It won't do anything in prehardmode if you try to grow it in one.

There is actually an issue with trying to get a Hallow biome to spawn after defeating the WoF if the direction where the Hallow is supposed to spread happens to run across the jungle, whereby the Hallow won't spawn at all. Players have had this problem and someone posted about it in this forum once.

[Alucard †]

Originally posted by Maomag:

Hallow will not do anything to the jungle. It only converts normal and other hazardous biomes in hardmode. It won't do anything in prehardmode if you try to grow it in one.

There is actually an issue with trying to get a Hallow biome to spawn after defeating the WoF if the direction where the Hallow is supposed to spread happens to run across the jungle, whereby the Hallow won't spawn at all. Players have had this problem and someone posted about it in this forum once.

Hallow won't convert Corruption / Crimson tho.
but it will stop it dead in its tracks that can prove a nice way of slowing down or even stopping Crimson / Corruption before you even get Clentaminator.

As for the issues of Hallow spread when it spawns within the Jungle.
Hallowed seeds are cheap buy from Dryad and even from a small patch of Hallow you can still get some pixies to spawn for pixie dust and craft Holy Water which is nice and efficient way (pre Clentaminator) to seed Hallow.

[Zemecon]

Originally posted by ⎛ Alucard ⎞ ✟:

Hallow won't convert Corruption / Crimson tho.

https://terraria.gamepedia.com/The_Hallow

^^^ That article even has a nice picture showing a converted Hallow biome. Though why they payed so much more attention to the effects of Hallow in prehardmode, I have no idea.

[Alucard †]

Originally posted by Maomag:

Originally posted by ⎛ Alucard ⎞ ✟:

Hallow won't convert Corruption / Crimson tho.

https://terraria.gamepedia.com/The_Hallow

^^^ That article even has a nice picture showing a converted Hallow biome. Though why they payed so much more attention to the effects of Hallow in prehardmode, I have no idea.

Well honestly i actually tried ingame to convert Crimson by throwing Hallow all over it.
The Hallow stains on the Crimsoned land stayed the same through entier game they didn't spread but the Crimson didn't go past them either.

The Hallow from V burst after killing WoF however i noticed can hit and convert Crimson but cannot spread more than from the initial burst if is caught between the evil (Like it happened on the edge of my snow biome)

[Zemecon]

The Hallow takes a while to spread over the Crimson. It won't happen overnight but it will eventually happen.

Likewise, you could pour vile powder over Hallowed blocks and probably convert that, but it would be converted back into Hallow.

I don't know what to say; the conversion rate of all three hazardous biomes is so slow that it isn't easy to prove to others which biome will convert which, aside from the normal biomes being converted by everything.

[Alucard †]

It didnt convert in 100+ hours the spots stayed the same through entirety of hardmode.
I am telling you it cannot convert other evil biomes even wiki mentions this hallow cannot take over Crimson or Corruption.

The initial V shape burst can but the actual spread cannot. Maybe with mods it can or on old patch it could as it mentioned in old patchnotes but on current ver vanilla it cannot.

The spread just stops once they both meet if there arent any non corrupted/hallowed blocks to convert.

I may be new but i have 200+ hrs and i pay close attention to details like this. I am 100% sure the Hallow i spread into Crimstone didnt spread even an inch from the initial spot after more than 100 hours playtime with like half of this beimg pre plantera while the spread speed is at its prime.

Idk what to tell you but what i saw ingame kinda says otherwise to what you told me. :3

It cannot be that slow if it didnt even spread after so many hours.

[Zemecon]

The wiki never says Hallow *does* convert Crimson (which is odd because it used to) but it doesn't say it *can't* convert Crimson, either. And there is an image right there on the page showing a converted Crimson biome. All they talk about is Hallow vs. jungle and the effects of Hallow in pre-hardmode. Which I find strange, but then this is testable. I just can't believe we would need to test something that was obvious a few years ago.

[Alucard †]

"Desktop 1.2.1: Crimson and Hallow now counteract each other"

Also look closely at the picture you are refering to.
Hallow is in form of a diagonal strip and doesnt deviate from that path untill its met with uncorruptable blocks at surface thats picture of one of the ends a V shaped burst encasing the prehardmode Crimson patches. (The one that happens after you kill WoF that one can convert evil biome in its path as it works like a beefed up Clentaminator shot)

Hallow and Evil cannot like i said spread on each other naturally.

Yea its testable and i did test it. Not on purpose but still the results are pretty clear.

Sorry no offence but nothing you say will change my mind on that topic as i know what i seen ingame :<

So we might just agree to disagree at this point.

[Zemecon]

Yeah... We will see about that. I could be thinking of the Corruption instead but I think it is worth a try. The wiki has been wrong before, believe it or not. That is why they let anyone edit it. There was someone in the comments section that did a similar test but that comment is gone. Not corrected, but gone. So I will concede and say I *could* be wrong but I can't be sure of that yet. We will see.

[Zemecon]

OK, this is probably going to lead to further arguing, but I came back after planting one block of Hallow seeds on my artificial Crimson biome, then exited, and when I re-entered I found something interesting:

https://steamcommunity.com/sharedfiles/filedetails/?id=1835119021

^^^ That used to be only one block of Hallow grass. Now there is more Hallow grass. I only planted one block. The rest was all covered in Crimson grass. Will continue to test.