So I am currently creating an extremely large map using terrain. As the map gradually became bigger and detailed i’ve had my studio closing down more and more.
Currently my map is about; 10240length x 4080width which is approximately 41779200 studs large.
10240x4080 isn’t that big, but it’s big enough to have pretty large performance implications with smooth terrain.
Roblox doesn’t handle terrain in “chunks”. Generally speaking, smooth terrain is pretty efficient but it will start to eat memory at high volumes like this. If you’re dead set on using smooth terrain, a good option is to enable StreamingEnabled. This does have its drawbacks and can make scripting a pain if you’re not familiar with it, but it will help performance a great deal.
If I’m correct StreamingEnabled also streams terrain.
So far I have seen some pretty big and fairly detailed maps created with smooth terrain. Do keep in mind that certain devices will find it hard to upkeep with the requirements and load that place fluently. Also in studio you are generally limited by the type of hardware you possess, so that is entirely subjective. There could be a limit, but so far I have not bothered to look into it.
From my experience with large bumpy terrain, it can be really slow for some people, and quite the opposite for others. I’d say your islands current size is probably the largest you could make it without it being too slow for some players. Others are suggesting to use StreamingEnabled, that’s probably what I’d try and do, but if you don’t want to use that you’d probably have to scale it down a bit, especially if you want to add a lot of buildings.
You can consider scaling it down a bit, or even hollowing the unwanted parts in the terrain to prevent the studio issues. Optimisation through that can work.
Overall, I don’t really know how much terrain chunks can roblox really hold, if somebody finds out about this or tells, that would be very grateful for all of you.
My comment pertains strictly to the problems with handling terrain in the studio, from my experience I’ve had this happen a couple of times but it was me trying to load in large amounts of smooth terrain than my computer can handle.
You can try using streaming enabled to increase performance as previously mentioned by @rolbloxguy1876. As for the choice of how you want to create your terrain is up to you, but if you are having similar issues it’s always good to think about downscaling your project.