So, i've done a quite big world in construction set and i have some problems with it.

1.First, there is a problem with terrain. I've generated textures, and placed objects automaticly in CS. In Game There is something like that http://img841.imageshack.us/img841/5006/screenshot0k.png
There is normal ground to one point, and then it dissapears, with trees, rocks etc. In editor it looks fine, and everything is placed. In fact in game, in this empty area is very low ground , without textures and objects. This odd hills in the distance, are not a problem, they are because bad LODs. So is there any chance to repair it?

2. Second, i've got a question about making LOD. My world is splitted in three .esm files. I was trying to merge them with tes4Gecko and wyre bash, but there is always a problem with too little memory.
I have 2GB RAM, and enough HDD, but is seems to be too little.

Thanks for any help

I had read recently, that putting objects (clutter, weapons, ingredients…) too near to cell borders, could cause that if one of this objects is displaced to another cell, if the cell where the object came from is loaded earlier, will prevent loading the second one. Maybe your first problem is related to that (maybe an object you had put in one of you generated cells is deleting another one, or could be that an object placed in one existing cell is deleting a cell you have created).

I've looked deeply in the problem, and got some conclusion.

My world consists of three ESP.

First one have regions , new world , heighmap and some generated terrain with textures and objects (generated one by one in regions editor)

Second and third have only terrain with textures and objects generated in regions editor.

Everything is ok in editor, but there is problem in game.

When I load all three ESM, only terrain in third is ok, and terrain and objects from 1 & 2 is missing.
When I load 1 and 2 , Ground from second is Ok, and this from 1 is missing etc.

What i should do?
When i merge second and third in TES4gecko, only terrain from 3 is visible