(FOR THIS TO WORK, YOU MUST HAVE NODE GRAVITY ON)

For this step, you will have to make a big metal ball. When it starts bouncing in and out slowly, it's good!

Next, keep the brush size and have replace material off. Then you surround the inner core with stone, do not worry if the metal or stone becomes sand, this is normal.

Finally, if the stone is compressing into the metal, it's working! If it doesn't, add a bit more stone.]
If the sand in the center is cooling down, add more stone. If you add stone at any point you do not need to, the core can possibly eat the mantle.[/previewimg