I created a tool that can generate nbt files with or without jigsaw blocks inside for large scale builds

I needed a large 500×500 map/structure that I could generate in my world, but I didn’t want to manually place all the structure blocks myself.

So I made a system where I can select the map area and choose the size of the NBT chunks it gets split into. It can also generate jigsaw data inside the NBTs, so the structure can be implemented directly into worldgen. Alternatively, I can generate it without jigsaws and spawn it later using custom code.

This works, but I’m wondering if there’s a better or more efficient way to generate very large structures like this. Has anyone done something similar, or is there a recommended approach for handling large structures in worldgen?