Dirt Walls (natural)

Dirt Walls are backing walls found in the Underground layer. These naturally occurring walls can be destroyed with a hammer, but will drop nothing, and cannot be crafted in any way. These walls do not stop enemies from spawning and cannot be used for proper housing.

As of version 1.4.0.1, these walls can be crafted at a Work Bench with Ecto Mist.

History
Mur de terre (naturel) 土墙（天然）