To resolve the "Server is enforcing consistency" error for models/infected/witch.mdl
The Witch is special. Unlike Common Infected or even the Tank, the Witch has complex behavior, unique lighting shaders (her glowing eyes), and intricate animation sets. Consequently, she is one of the most frequently modified files in the game.
C:\Program Files (x86)\Steam\steamapps\common\Left 4 Dead 2\left4dead2\cfg 2. Identify the Conflicting Mod
Before we dissect the Witch, let’s break down the technical jargon. "Enforcing consistency" is a file integrity check built into the Source Engine (the game engine powering Left 4 Dead 2).
If you are playing on a server that uses sv_consistency 1 (which is most vanilla servers), you have two options:
Client-Side Anomalies and Server Enforcement: A Case Study of witch.mdl Consistency Errors in Left 4 Dead 2