I've recently answered this question: Do WALLS matter if I'm building the 6-inch brick defense from Corruption/Crimson for my city? [duplicate]. The question was closed and points to a duplicate question aptly named How does corruption spread?.
Now, there are two problems that I see in this situation:
- First is that the 1st question shouldn't have been closed, IMO. The question asks for the effects of corruption spreading on background walls, which isn't covered in the duplicate question or in any of the answers given.
- Assuming the duplicate flag is well-intentioned (since the question is itself the highest-voted that relates to The Corruption), it's severely outdated. The answers refer to 2011, and the accepted answer relies a little on "guesswork", i.e.:
[...] so I'm not sure who is correct.
The game has been recently updated, and since it's release, official and unofficial sources (the Terraria wiki at gamepedia and at the wikia pages) have confirmed some, if not all of the game's mechanics.
Now, my predicament is the following: I started to write an updated answer that encompasses everything that I can think it's worth to mention about Corruption spread. It's however a lengthy list, and most of it is copy-pasted from the sources. I am at the dilemma where just stating the links will incur in comments such as "to prevent link-rot or to prevent users from looking at the page or etcetera" and where posting the list (from what I was able to see on meta about the topic) has a dubious stance (check this, this and also this).
I ask for some guidance to this problem.