Level streaming in an open world - shouldn't the landscape be persistent?

Hello everybody !

I’m trying to do a game project where I have this big Island (created in world machine) of about 10 km diameter…

I’ve read a lot of things on level streaming and stuff but there’s a few things I don’t understand.

For example, shouldn’t the landscape be persistent ? Because in my case, you have visual on half the island most of the time, so if I cut off my landscape into small chunks, wouldn’t it be weird to have only the next chunks loaded ? Is there a way to do things proprely ?

Also do you know what best side it would be for a standard chunk to have ?

I’m quite confused because I don’t know where to start, to make things easier for the next step…

Thank you very much in advance,