FNV Mod Limit Fix

Installation

You will need NVSE for this plugin to work. Simply overwrite your Data/NVSE folder with the folder in the zip file. It works with MO2.

Why the Limit Existed

Despite the plugin limit being 255, it's not possible to reach that vanilla game, as the program has a limit of how many files it can open.

The "plugin limit bug" exists because game opens file handles for each plugin, for every form-processing thread (3-4 threads).

Unfortunately, game uses stdio for the I/O interface, which by default has a limit of 512 maximum file handles that can be opened at once.

When loading anywhere around 140 plugins, the game requires around 420 handles for these alone. Add to that BSAs, audio and various loose files added by mods, and game easily can request more than 512 handles. This is the reason assets stopped loading and things would begin to go south.

How this Fix Works

The mod replaces stdio functions with direct Win32 ones. By getting rid of the middleman, this effectively removes the file handle limit (Windows itself manages the handles now), allowing the game to load all 255 plugins properly (and all other files).

Files also open and read faster than before, thanks to reduced overhead.

Performance Boost

The increase in fps, stutter removal and decreased loading times seems to affect everyone to a different extent. This mod can only have positive performance benefits and will in no way affect any of the game's content. The only way to know if it will benefit you is to download it and try it for yourself.

Thank you to RoyBatty and lStewieAl for helping me along the way.

Thank you to lStewieAl for gifting me Premium. Please check out his QoL mod Stewie's Tweaks.

Version 4: https://github.com/WallSoGB/ModLimitFix

Version 3. 1 and earlier: https://github.com/ira