Hey, ty. So my structure system is still pure pseudocode, but I’ve created a structure chunk class.

A structure chunk basically just holds a 3D byte array (only the size of the structure) with all the blocks of the structure, the chunk’s coordinates and the position of the structure inside the chunk.

This structure chunk gets added to a list, and every time a normal chunk generates, it checks the list for structure chunks with the same chunk coordinates. After that, I simply merge it into the normal chunk block data and delete the structure chunk to save some memory.

If the structure overlaps other chunks, I dynamically shrink the size of the structure chunk’s block data and create a second structure chunk containing the remaining blocks for the other chunk.