Why does the ground move ?

No smart Alec answers please

I suppose I should be grateful the ground moves for me, but I'm not.
Almost everytime I log in I have to repair something that has moved. I and others are absolutely convinced that it is the ground level that is continuously changing which in turn pushes large partially buried prims out of place. This is extremely tedious !

Do Linden Lab recognise the problem exists ?

Please fix it soon ( ish ! )

I've never had the ground move on me, the only person i know who had this happen to left allow edit turned on in the about land preferences, so anybody could edit the land, which they did and buried her house. Also if the land is group owned then any officer and their deeded scripts can edit the land.

It's a sign of true love.

Whenever some part of the ground moves, it's usually at my property borders where the neighbor has moved land which affects mine slightly. After several failed basement builds whose edges were easily messed up with movement, I had to design one where the edges didn't matter much.

If it isn't the neighbors, it's the same sort of problem as the one where the prim state has reverted to an earlier one and has to be redone. The only thing I can suggest is that you make the land exactly the way you want it, then uncheck "Edit Land", then wait at least five minutes before logging off.

I've noticed each time you relog, the textures on the ground may blend differently, but I haven't noticed radical changes insofar as height goes.

mmm, I'm going to do an experiment to prove it once and for all ... fetch my theodolite ...

I've found bugs in the past which were poo-poo'd until proven

It is interesting no-one else is seeing this yet many people are complaining about prims moving of their own accord. What I'm seing could just be prim drift, but it only seems to happen to partially buried prims.

I may have experienced it too... had a car parked on my land, tires right at ground level. Over a period of a few days, I swear either the ground moved up... or the car sank down... tires were definately not at the same level they started at!

aha ! It's your firewall !

yes you are right! Of couse! Isn't everything on the client side? /runs off to uninstall, reinstall, new chipset, video drivers, oh yes... and bios update, and ... and ... =P

love your shades btw ^_^

Yes that's understandable, what I'm talking about it land in the middle of large plots.
I do do a lot landscaping it's true, but the problem I'm experiencing doesn't happen over a few minutes, it can be many days ( at least before I notice it ).

Also my builds are all on very steep hillsides which could be a factor.

Edit Land *is* turned off in About Land, right?

HI i am having huge problems with land, not just a little, i do some minor edits on the land, everything is ok, i log off and when i log back on the ground has sunk upwards of 20 meteres and has raised in others. this is extremely frustrating and everything has to be done over.

I also have problems with things on the land sinking or being elevated, where the land has not moved.

i now dare not build because if i do its all askew when i log back on and i do stop a long time beofre i log off.

anyone got any Helpful suggesions?

dana

Small movements in land near parcel borders is related to some lossy compression in how we stream the terrain data. There is evidence from our research into the new rendering engine that it is probably easier to just stream the terrain data in its full precision, since it represents less data than a typical 512x512 texture on a simple object.

Lossy compression effects will be most noticable near sharp features (sudden cliff or very tall spike or very deep hole).

dana Archer's problems sound like a bug. I wouldn't expect the terrain to drop 20 meters while dana was out, unless the parcel was on one of the legacy regions which allow for very wide terraforming limits and the parcel was set to allow anybody to terraform it. I'd be curious to know where and when this sort of terrain problem is occuring. You can send me email directly at [email]andrew@lindenlab.com[/email] whenever you see this problem.

You can also email me directly when you see another problem that can sometimes happen -- all of the terrain appears to have shifted East by several meters. This is a memory corruption bug that I still haven't been able to track down yet -- it is very rare and I don't know now to reproduce it (but I do know how to repair the terrain and content if I find out about it soon enough).

Andrew thanks for taking time out to explain this. Lossy compression sounds most likely the problem I was seeing, it certainly seemed to be worse for a period after editing land. Anyway it's stopped moving since my post so I'm happy now anyway