Irrlicht Engine

I maybe have misunderstood something, what is the culling ?

Running out of memory with 4Go ???
My guess is that the list than containing all the SceneNode get overflowed, but since i'm using Irrlicht .NET CP i can't catch the exception in Visual so i'm trying to modifying it, anybody got an other idea ?

Anyway hybrid if i get your idea properly i will have ...

Na you didn't get it guys
it's not a 2049*2049 heigtmap, it's 2000 256*256 heightmaps ^_^
Sorry if i didn't said it properly, english is not my mother tongue langage.
Anyway thanks for the help and the fast reply =D

Hi there i'm using Irrlicht with .NET CP and i'm trying to load a lot of heightmap (something like 2000), but after a few hundred loading i got an engine crash (i've got a C++ runtime error window).
It's probably due to large amout of data, and now i would like to modify the engine to enlarge the ...