RTB3 has a "saveBricks" command for dedicated servers which will save all bricks. Just put saveBricks(); into the dedicated console and it'll give you a usage example.
So it saves every bricks, rendered or not? Does it work on normal servers also?
Anyway, I don't know why people space out their RPGs. Does you're 8 year old computer lag in my server? Too damn bad. Get with the times.
That isnt it.
Each Island is different from eachother. Each has their own sky space. If I had all the islands next to eachother, it would look weird because you would only be traveling a small distance to get to the next via the boat. You cant see the other islands from the island you are on.