How to make a procedural low poly sky islands generator

Hello, for my game I want to do a procedural floating islands low poly generator
I was looking for tutorials but everything I find is always for a terrain, with water or other things, so I was thinking that I could do a prefab of a terrain with the generator script (in Start () I create the generation), and I do that The prefab appears in different parts of the world. The problem is that I do not know how to make it appear at the beginning or as the player moves.

If you think the idea is good:
Can you give me a tutorial or tell me how it would be done?

If you think the idea is wrong:
Could you tell me some other idea?

Hello,

your approach is good, a “sky island” is not different than a piece of terrain floating in the “air”.

I’m not sure what you mean by “make it appear at the beginning or as the player moves”, but I’m guessing you mean frustum culling? If you elaborate on what this means I will help (editing this answer).

Either way, I wouldn’t do it with prefabs, I would generate it procedurally. For procedural generation of terrain, this is an AMAZING tutorial: http://catlikecoding.com/unity/tutorials/noise-derivatives/