Deadrails

[lone cloak]

procedural generation.

For example, create a model with design and so, and maybe add "Start" and "End" part.
Then loop the folders, do math random, get random Model (segments) and place it, find the "end" part, and place another segment there.

Yes. functions like FillBlock() or whatever.

Or i assume, you could also prebuild a terrain and "clone" it

https://create.roblox.com/docs/reference/engine/classes/Terrain#summary-methods

"CopyRegion"