- Not to be confused with the 猩红石墙.
Crimson Walls are backing 墙s found in the 地下猩红之地. These naturally occurring walls can be destroyed with a 锤, but will drop nothing. These walls do not stop enemies from spawning and cannot be used for proper housing. They will not spread the Crimson, however viewing the status with the dryad will consider this Crimson; To achieve a 0% Crimson World, you will need to either break these using a 锤 or use the 环境改造枪.