The scene has fragmented. New players are using (the open-source engine), which loads PK4s faster but is picky about compression (Store method only; no Deflate64). Meanwhile, the Id Tech 4 Remix project is experimenting with layered PK4s – think Minecraft resource packs, but for Mars.
Use these to verify you have legitimate, uncorrupted files: doom 3 pk4 files download new
: The engine reads files in alphabetical order. A file named pak999.pk4 will override settings in pak000.pk4 The scene has fragmented
You're looking for DOOM 3 PK4 files to download! no Deflate64). Meanwhile