I just wanted to get a better understanding of how the engine handles Large Mesh Objects and what determines when static objects stop being added to the area objs container and get broken up and stored as a Mesh Group?

Decided to upgrade to the source code so I can answer questions like this myself. I'd sooner see Greg working on new functionality than spending time answering questions

Just in case you still need the answer:
The object will be split if it has class set to "Terrain" and its total size more or less exceeds the size of a single area in a world.

Thanks Greg