The Dirt Wall is a placeable block used in the background layer. Before the 1.0.6 update, it did not prevent Monsters from spawning and could not be used to make a Home. Naturally-occurring Dirt Walls can only be broken from an edge, using either a hammer-type tool or an explosion (bomb or dynamite), and do not drop anything when broken.
The Dirt Wall is a placeable block used in the background layer. Before the 1.0.6 update, it did not prevent Monsters from spawning and could not be used to make a Home. Naturally-occurring Dirt Walls can only be broken from an edge, using either a hammer-type tool or an explosion (bomb or dynamite), and do not drop anything when broken.