Questions about spread corruption

[Lord Benendearu]

Hello,

I play on the server of a friend of mine and one of her rules is that using corrupted blocks on the surface is forbidden. The reason for this rule, is because she heard corruption can quickly spread around the server, destroy complete biomes and, most importantly, make the server unplayable because of the lag the changing blocks cause.

This is a bit unfortunate, as I am kind of on an evil overlord tour, and want to turn the landscape around my current residence into a dark Mordor-like landscape, using corruption. But I refrain from doing so, as I do not want to damage the server.

So here are my questions:

* How quick does corruption spread? As in how long does it take before it takes over the entire surface?
* Is there a way to easily restrict Corruption to a certain area, preventing it from taking over de entire world?
* Can corruption really make servers unplayable?

[Mirika]

The place this [friend] read upon it, was this topic:
https://steamcommunity.com/app/280790/discussions/0/619574421345080867/
It's the 6th + 7th comment.

I found this topic after placing Corrupt Water myself and saw blocks turn over to the dark side. I'm starting to wonder also, is it just Corrupt Water that destroys the server, or is it dangerous to use Corrupt Dirt/Stone/Leaves above surface as well?

I was about to make a test server for this, but it takes quite some time to go ahead and get to corrupt level all over again.

[Juggernaut]

The only way so far to restrict the corruption is with healing beacons, though you would need a large ring around the area you want to corrupt, and they dont have a large radius both horizontal and vertical so it can still easily spread underground. Might i suggest either building your base in the corruption itself and simulating a small sun (gas lamps), or digging out a ludicrously large hole all the way down from the surface (best bet would be excavators).

[Mirika]

Oh yuck, I forgot it can spread underground as well. I thought it would just change the surface.

So these healing beacons would have to not only surround the area, but also block it off entirely beneath the area?
That sounds terribly messy, and something that could easily go wrong...

I was thinking of blocking it off with hardened lava and igneous rock, but I have a feeling that is going to take even more effort than throwing healing beacons around, at least on large scale.

[thelostkitten]

Originally posted by C John 3 16:

The only way so far to restrict the corruption is with healing beacons, though you would need a large ring around the area you want to corrupt, and they dont have a large radius both horizontal and vertical so it can still easily spread underground. Might i suggest either building your base in the corruption itself and simulating a small sun (gas lamps), or digging out a ludicrously large hole all the way down from the surface (best bet would be excavators).

You can contain corruption with manufactured blocks. I would suggest a double layer though around (including under) if you want to put it on the surface.

[Eveaustria]

Corruption-spreading has been changing with different patches. Once it was possible to corrupt a whole ocean after placing one block of corrupted water into it. Such it was able to make worlds a pain to play on. However this is not the case any longer (As of R26 in December 2015).

Current corruption-spreading-"rules":
* corrupted wood can still corrupt wood-blocks if touching them, but not leaves; so the wood of a whole tree could be corrupted this way, except its leaves
* EDIT (sorry): wood can be corrupted by corrupted dirt, corrupted stone, corrupted grass and also by corrupted leaves, but not vice versa
* corrupted water can only corrupt wood and/or grass blocks that the corrupted water directly touches nowadays
* corrupted water cannot corrupt stone, dirt nor leaves anymore, it also won't corrupt ordinary water nor will it "change back" mineral water to corrupted water
* corrupted stone, corrupted dirt, corrupted leaves and/or corrupted grass cannot corrupt any other blocks than wood touching them any longer
* logs and parchwood leaves cannot be corrupted, not even by corrupt bombs, neither blocks from underground-layers, snow, ice, nor any blocks (EDIT: except for most wood- and leave-blocks!) that came with the "new" biomes in R14, like dead grass, savannah grass, canyonstone, etc.
* blocks that you can craft from corrupted blocks will not corrupt anything else (like Corrupted Stone Wall for example)

Some or all of these mechanics might be changed again in the future though...

[TalonAeolus]

If we're talking about corruption bombs, I thought they only spread in bodies of water. I used corruption bombs to build my corruption mob spawning room. It seems to only affect a 7x7x7 cube, centered on where the bomb hits. So far, I've never seen it spread to other solid blocks.

[Mirika]

We did see Corrupt Water touch dirt and grass around it, so I assume it still applies to dirt if it directly touches the water.

Because things may be adjusted in the future, I consider it risky still when used above surface. I do know the crafted Corrupt Wall is safe, I use it in my house. It also does not apply corruption on you in general, which makes it a lot safer to use and still carries its dark looks.

I assume that if you make a corrupt island in the sky (not touching any surface) would be safe, as it cannot pass over through the air. I think this is a way to make a desired corrupt landscape.

We're not talking about corrupt bombs though, it was all about me forbidding my players to use corrupt blocks on surface, because I had read upon it being able to spread all over your landscape and possibly ruin your server. I'm a bit anxious about why they made corrupt bombs in the first place, knowing the above...
But as Eveaustria said, since the latest update it doesn't spread right now, I'm just really scared about adjustments that might be made in the future again.

[Saraneth]

I'm assuming everyone's talking about some major catastrophic event that happened before I joined the game. I keep flowing corruption water in my kitchen next to water and natural blocks, and I haven't had any issues.

http://steamcommunity.com/sharedfiles/filedetails/?id=588588206

I also have corruption spawning grounds in my ocean, and thusfar, it hasn't spread to the water or affected the clean water kept inside.

[Mirika]

I'm not so much worried about water affecting water, my worry is water affecting the landscape, as this is what is desired. I've already tried throwing water against water, no kind can take over the other for as far I've seen. The OP speaks of turning the landscape below his airship into corrupted landscape.

You say next to water and natural blocks, do you mean the hardened lava with that? Cause those aren't ones that can be swapped into corrupt anyway (assumption based on how corrupt level is contained to stay down there especially in the days it apparently was catastrophic).

But I think that it is best that I advice my friend here to perhaps make a corrupt layer in the sky below his air ship. If the game ever changes corruption above surface to be dangerous again (I really do not want to take the risk), it will be contained by the fact it doesn't touch the surface at all.