Aha ok. I have seen the same thing with the forest i planted around my mansion when I coming home from the sea but it never really annoyed me that much.
From the distance I still see the naked hill how it was in it's original state, then the trees i planted starting to popping up everywhere.

The only thing that annoys me is that the bonfire I want to have as a lighthouse, rendering the same time as the rest of the mansion. So it's pretty much useless as a lighthouse.

Edit: As for the loading time it's never a problem for me as i have a separate 1 TB M.2 disc for gaming installed.

on that build yes however it was flying, and free crafting because I had built a similarly large base but lost the save file to corruption and i was not about to put another 100+ hours into farming and re collecting all that i had already collected.

That's a very impressive build. Since you last played a while ago you could try the optimize terrain command in the console - optterrain

alright ill be posting several screenshots of my mega build that i spent well over 100 hours on, there was a LOT of teraforming, a LOT of placed objects, using mounts to place mushrooms on the forrest flore, and making large banquet tables etc, i just gotta figure out how i post screenshots here..

https://steamcommunity.com/profiles/76561198378121330/screenshots/

if i did this right here should be around 34 screenshots of my town, its not all the interiors but it has a lot of them and most all of my base can be seen through these, some will also show that from a distance many structures are simply unbuilt and when i get closer they begin building themselves and re-teraforming the land which can take upwards of 30seconds to fully load back in,

Basically, what the OP is saying is that it seems the system renders distant objects like abandoned towns in their original saved state, even though he has built/revised that town since he found it. So when he moves closer to the town from the distance, the new stuff starts rendering in, replacing the old stuff.

Mind you, I haven't had that issue. Are you (KrypticGaming) using any mods?

What does it matter if the building disappears when you look away. Not like you are looking at it anyway. Useless post.

I'm confused by this post. OP, are you saying your builds get deleted entirely when you look away from them?

Sounds like a distance rendering issue on the OP's part?

He probably means that his/her game resets to an earlier save state. Probably a mod issue. I would pretty much completely delete Valheim, reinstall and then try again WITHOUT mods.

See if the same thing happens again.

OP, in another post:

"oh yea i havnt been playing recently but when i last playted i built a ... well it was a large settlement, with a lot of ground flattening and tereforming of the land, if i turn away from my buildings the game unloads them and reinstates what the land once looked like.. idk why they havent taken a note from minecraft where it basically overwrites the original land and saves what you built in its place as the new perminent land feature.. its always fun when you turn back to your town and it takes 40 seconds to load everything back in"

P.S. - *Kryptic

Are OP referring to middle/late game raids?

What?

title is ambiguous
culling ? -> would be a waste of performance to render sth outside the fov
buildings returning to their former states ? -> make backups

This makes no sense, lots of people have made huge builds... I myself rebuilt the ruins of Atlantis.

https://steamcommunity.com/sharedfiles/filedetails/?id=2488297750