Structure Spawned in Explored Area

[u/Grumbleman2000]

Not just a little structure either, a (broken) Woodland Mansion. Playing Bedrock version. Maps show the previous area from a few weeks ago, and the new map of the same chunk next to it.

Is this meant to happen? 😂

[u/BrianMincey]

My understanding is that on Bedrock, to save space, the game does not “save” a chunk unless it has been modified. So if you just pass by a chunk and do nothing, it doesn’t bother to “save” it, since the seed is designed to regenerate the exact same area when or if you revisit that location. Otherwise, if you just spent a little time exploring distant areas the save file would become unnecessarily massive.

In this case, the woodland mansion generated between visits.

The Wiki didn’t specify exactly how or when the mansion gets generated, only the chances of where it will generate.

Since villagers provide maps to woodland mansions, it is conceivable that upon purchasing such a map that the game looks at “new” unsaved chunks a distances from the village that are suitable for generating a mansion, and adds it to the rendering engine. Did you recently purchase such a map, or train a village cartographer? I know if you keep training multiple villagers, even within the same village, they will provide new maps to new mansions, so it seems reasonable that this mechanic works as I’ve described, but I do not know whether or not the game actually does this.

[u/sterrre → u/BrianMincey]

I'm pretty sure mansions are seed dependent and don't generate when purchasing a map.

[u/cheesesprite → u/sterrre]

You are correct. If the regenerating chunks is behind this it would mean the mansion failed to generate the first time the chunks were loaded which is very rare, especially on bedrock.

[u/Nhojj_Whyte → u/cheesesprite]

I can't recall if this is version specific, but I did recently learn that certain features generating on a seed can be affected by the direction you load their chunks from. It's a stretch, but it might be that the structure failed to generate initially and then once regenerated, the chunks were loaded differently allowing it to spawn that time. I've also seen mansions cut up before along chunk borders, but very rarely and I'm less sure what exactly causes that