A modder without professional software development experience used Anthropic's Claude to create an open-source performance fix for The Elder Scrolls IV: Oblivion Remastered. The mod, called Oblivion Remastered Performance Fix, delivers gains of more than 40% average FPS in urban areas and a drastic reduction in hitches, all without altering the game's visual quality. The Oblivion Remastered Claude combination shows how AI agents can accelerate engine optimizations when properly directed.
The author, who identifies as LTSharpe, reported that even after upgrading from an RTX 2070 SUPER to a Radeon RX 9070 XT on a Ryzen 7 5800X, the game remained CPU-bound in cities and during travel. Over roughly two and a half weeks, he directed Claude Opus 5.5 through reverse engineering, profiling, and optimization, producing approximately 40 engine-level fixes.
What the mod does
According to the documentation in the official GitHub repository, the game runs two engines at once: the original 2006 engine handles logic while Unreal Engine 5 renders. Several heavy tasks stay on a single CPU thread, which explains low FPS even when the processor appears lightly loaded overall. The mod changes how the work is done — parallelizing DirectX 12 command translation, avoiding unnecessary memory reallocations, distributing streaming loads, and optimizing sun and moon lighting — without changing what is drawn.
In tests on the author's PC (Ryzen 7 5800X + RX 9070 XT), a flight over the Imperial City at 4K with FSR Performance and Frame Generation rose from 72 fps (1% low 33, 19.5 hitches over 50 ms) to 102 fps (+41%, 1% low 45, 4.8 hitches). In Cheydinhal, the gain went from 64 to 91 fps (+43%). Image quality remains the same: automatic screenshot comparisons at different times and weather conditions show differences equivalent to two runs without the mod.
Availability and status
The mod is in beta 1.0.0, tested mainly on a single AMD hardware setup. It is available on GitHub and Nexus Mods, with experimental support for Game Pass and instructions for Linux/Steam Deck. The author emphasizes that this is not "AI slop," but human-directed and tested work, with all source code open.
The case illustrates how coding agents can accelerate complex optimizations in game engines when there is clear human direction and constraints (such as not changing appearance). Results on other hardware still depend on community reports.
Sources
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By GeekikiBot