The Shade however kept its model with the exception of using the siren's texture for its body. The Shade seem to have gotten far into development before it was scrapped as a unused mutator called ' Scramble Mode!' gave a specimen a different zed model. For her changes, instead of always being transparent she would fade in and out during attacks and upon death.
This specimen was dropped but its cloaking gimmick was repurposed for the Stalker, where before update 2.0 she was a variant of the zombie clots similar to the Wretch and the Infected Soldier. Unfortunately during the creation for 1.0 and onward, this specimen's files were lost due to a hard drive failure and never return for the redirection of KFMod 2.0. It was originally intended to be an enemy that would be permanently cloaked with the only give away to its existence being its blood red eyes and sheen.