Loading a map in segments

I’m trying to make a grid based map. (64x64 chunks (each chunk is 20x20units) ) Each chunk is premade by me and loaded reference. I’ve already got the code to determine which chunks need to be loaded and unloaded. ( 5x5 chunks around the camera)

As of now a chunk has a plane with 6.5k tris. At most 5 new chunks are loaded at the same time. But this results in a one second freeze with a 8.4MB GC Alloc.

If i load them all at the start of the game. It removes the freezes during loading new chunks. But having all 4096 chunks and it’s content inactive sounds worse then instantiating them.

Does anybody have any experience with creating these type of maps?

 

switching the renderer on and off sound way cheaper then instantiating. are you also destroying the old ones if the new get instantiated?
maybe this can help if you didn't already see it... https://forum.unity3d.com/threads/tutorial-procedural-meshes-and-voxel-terrain-c.198651/

 

With instantiated during camera-movement i destroyed them. With all chunks loaded on start i disabled them.

The result i'm trying to get is something like this overworld map of Oracle of Seasons. But instead in a 3D top down view.


All of the chunks are built in 3DSmax and don't contain any voxels (imagine each chunk being a ProBuilder segment).
Switching the renderer on and off is cheaper. But having each chunk already active in the scene results in 204k+ inactive GameObjects in the scene (64x64x50, 50 being the estimate of amount of objects a chunk wil contain)

I don't know what Unity does with inactive GameObjects. They still take up memory so that's why i wanted to instantiate them during camera movement.

 

don't have the time atm to watch it but maybe this can clear up things.
https://unity3d.com/learn/tutorials/topics/scripting/activating-gameobjects
as i understand it, deactivated objects do take memory but not as much CPU to activate as instantiate/destroy does.
the voxel terrain tutorial is ment to have a look at how it handles loading - unloading chunks.

 

i hope you can see my answer, I have the same question with you, I hope you did it, and can you guide it to me?