Fallout 3 FPS RIL

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Responsive Interpolation Layer

Fallout 3 FPS RIL interpolates the camera, first-person weapon, world transforms, skeletal animation, and mouse look between the game's native simulation ticks. It is a reversible runtime injection and does not modify the retail executable, game DLL, archives, or saves.

This release supports Fallout 3 GOTY 1.7.0.3 GOG version and other retail versions provided their layout matches what the patch expects. Unsupported builds fail closed.

This is an unofficial, experimental, largely AI-generated patch. Back up your saves and expect that multiplayer, demos, overlays, ReShade, and other injectors may be incompatible. Extract the archive into the directory containing Fallout3.exe (make sure you either download the release with the bundled loader or otherwise that you already have an available ASI Loader installed in the game's root directory (like Ultimate ASI Loader)), then start the game normally.