Make the thin layer of voxel as a planet's shell thicker/have backpacks freeze when they hit a planet's surface
You know how backpacks sometimes fall into the emptiness of a planet? Would it be harder for backpacks to fall through a thicker layer of voxel? If not, would it be possible to make backpacks freeze once they hit a planet's surface? (they don't have to freeze in space) I've lost a few backpacks through planets. The most recent happened today when I was carrying all my steel plates to build a ship to get ice for my hydrogen ship with no refinery.