LoadChunk

public void LoadChunks(Vector3 playerPos, float distToLoad, float distToUnload)
    {
        for (int x = 0; x < world.chunks.GetLength(0); x++)
        {
            for (int z = 0; z < world.chunks.GetLength(2); z++)
            {

                float dist = Vector2.Distance(new Vector2(x * world.chunkSize,
                z * world.chunkSize), new Vector2(playerPos.x, playerPos.z));

                if (dist < distToLoad)
                {
                    if (world.chunks[x, 0, z] == null)
                    {
                        world.GenColumn(x, z);
                    }
                }
                else if (dist > distToUnload)
                {
                    if (world.chunks[x, 0, z] != null)
                    {

                        world.UnloadColumn(x, z);
                    }
                }
            }
        }
    }