Spider Wall

The Spider Wall is a naturally-generating background wall found in Spider Caves. Unlike other naturally occurring walls, it can create Cobwebs over time, allowing it to be used to farm Silk. These walls can be destroyed with a hammer, but will drop nothing. These walls also do not stop enemies from spawning and cannot be used for proper housing.

The Infested Spider Wall is an item that places a Spider Wall that can spawn Wall Creepers and Black Recluses. It is visually identical and is obtained by throwing a Spider Wall into shimmer.

On the, this wall can be crafted from Cobwebs where it can be used like other craftable walls. However, Spider Walls placed by the player do not spawn spiders and do not contribute to a Spider Cave biome.

Trivia

 * On the background texture of the wall there seems to be a bound NPC. This could be a reference to the actual Lost Girl, or more likely the Stylist NPC as she will initially spawn (bound before rescue) within a Spider Cave.