Even pros mess up PK4 files. Here are the most frequent issues.
Most original installations contain several "pak" files located in the directory: pak000.pk4 to pak004.pk4 doom 3 pk4 files
Because PK4 files dictate how data streams into the engine, poor file optimization can lead to micro-stutters during gameplay. 1. Fixing Game Stuttering (Unpacking Assets) Even pros mess up PK4 files