Maybe someone already post this idea. I think it could be great if we could merge graph side by side to create bigger terrain with a better control.
Also create one big terrain then be able to split in smaller parcel to detail them.
Specially for video games where you need to design vast worlds from smaller to bigger details.
Using Gaea I feel that if it was possible it could be easy to work on a big environment with a team that work on different parts of the landscape and be able to see the entire landscape at the end with perfect matching between those.
I hope that make sense sorry for my bad English.
Looking forward to see your though about this idea,
Thank for reading.