What is the highest possible altitude for a skybox?

[Jennifer Boyle]

I posted this in the wrong area with a blank body because the question needed no elaboration, so I deleted it and posted it here.  The software won't let me repost it for an hour, so I'm putting this text in so it will be different.

[KarenMichelle Lane]

I have tenants who have successfully rezzed a platform and a building at just under 4096m high. They are at 4000m where I get a bloody nose if I fly up there.

The platform is rezzed and bounded properly at sea level 1st, then it is Z-modified to the high altitude which makes it a nice target for additional building and object rezzing. Remember, some assembly scripts my go haywire at that altitude.

Also, remember, the LL provided parcel security fails at that height.

[Innula Zenovka]

The maximum build and rez height is 4096 metres, so the maximum altitude will, in practical terms, be a little below that (to enable the occupant to rez and place things above the root prim of the skybox, assuming the skybox's root prim isn't in the roof).