They define the height of the terrain at any given (X, Y) coordinate.
Can take several hours depending on your CPU, as the computer must "calculate" every possible walkable path in the entire game world. Summary Checklist for 3.3.5a Developers Primary Function Impact if Missing DBC Client/Server Data Sync Crashes, broken spells, UI errors. Maps Terrain Height Falling through the world. VMaps Collision & Line of Sight Shooting through walls; no LoS. MMaps Pathfinding (AI Movement) Pets/Mobs getting stuck or "clipping." WoW-WOLK-3.3.5a-Server-DBC-Maps-MMaps-VMaps-Wor...
VMaps prevent "Line of Sight" (LoS) abuse. Without VMaps, a mage could cast a Fireball through a solid stone wall, or a guard could see you through a closed door. They define the "solid" objects in the world that projectiles and vision cannot pass through. 4. MMaps (mMap / Movement Maps) They define the height of the terrain at
DBC files are the database of the client side. They contain structured data tables that define almost everything that doesn't require a 3D coordinate. Maps Terrain Height Falling through the world