Ppf.esm Repack Guide

Are you experiencing a specific (e.g., in downtown Boston)? What is your mod manager (Vortex or MO2)?

: Almost always required as the base for any stable mod list.

ppf.esm (via the PRP project) works by patching the game’s "previs" (pre-visibility) data. This tells the game engine not to render objects that are hidden behind walls or buildings, drastically reducing the load on your GPU and CPU. Without this, high-density mod lists often lead to the infamous "mini-strokes" or micro-stuttering experienced by players. Installation and Compatibility in 2026

: If you use mods like Sim Settlements 2 , you may need specific patches to prevent NPCs from becoming unresponsive.

If you are using Mod Organizer 2 (MO2) or Vortex, you must install the proper PRP archive. If you have done a "merge" in MO2, you must ensure you update both ppf.esm and PRP.esp to the same version (e.g., 74.xx).

(This should be at the very top of your ESM section)

If you are troubleshooting an old saved game, try disabling ppf.esm (and Project Nevada) and run your save through a cleaner like —but starting a fresh mod list is the better solution.