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@xoxor4d xoxor4d released this 27 Nov 19:25
· 300 commits to master since this release
1.0.0
6e72abd

Edit 30.11.2025:


Edit 29.11.2025:

  • Slightly updated the installer to hopefully prevent false positives

01

Installation:

Install using the installer:

  1. Download GTAIV-Remix-CompatibilityMod-1.0.0.zip

  2. Download GTAIV-Remix-CompMod-Installer.exe

  3. Place both files in the same folder (no need to copy them to your game folder) and run GTAIV-Remix-CompMod-Installer.exe with Admin Rights if your game folder is in some way protected

  4. Use the File Dialog to select your GTAIV.exe which is located in your GTAIV install folder

  5. The installer will ask if you want to install a custom Fork of FusionFix
    If you already have FusionFix installed, it's definitely recommended to install this because the original, unmodified version has a few incompatibilities with RTX Remix. If you do not have FusionFix installed, you are free to choose. It's not a requirement.

  6. Make sure that you remove all custom launch arguments for GTAIV in Steam (if you have any set)


Install manually:

  1. Download GTAIV-Remix-CompatibilityMod-1.0.0.zip

  2. Open the zip and extract all files contained inside the GTAIV-Remix-CompatibilityMod folder into your GTAIV directory (next to the GTAIV.exe). Overwrite all when prompted.

  3. If you want to use FusionFix or have it installed already, it's definitely recommended to install my custom fork of FusionFix because the original, unmodified version has a few incompatibilities with RTX Remix.
    You can find the files inside _installer_options/FusionFix_RTXRemixFork. Extract the plugins & update into your GTAIV directory and override any existing files.


Usage and general Info

Run the game like normal or use the provided batch files (mentioned further down) if you notice heavy stuttering.

It's recommended to adjust distance and quality sliders in the GTA4 graphic options (higher values => earlier CPU bottleneck).
Try 50 for view distance and 30 for quality and adjust from there. The first launch might cause problems, simply re-try a second time.

Press Alt + X to open the Remix menu
Press F4 to open the Compatibility Mod menu


Troubleshooting / Tips

  • Running Windowed
    Open the commandline.txt in the main game folder and add -windowed
    If using FF: Adjust the Borderless setting in the game options to your liking
    (plugins/GTAIV.EFLC.FusionFix.cfg -> BorderlessWindowed = 0/1)

  • Forcing a Resolution (if something goes wrong with resolution selection)
    Either go to your GTAIV folder and open rtx_comp/game_settings.toml (after running the game once)

    • Set manual_game_resolution_enabled to true
    • Adjust the resolution using manual_game_resolution = [ .. ]

    OR Open the commandline.txt in the main game folder and add -width 1920 and -height 1080 (adjust for your resolution)


Issues / Performance / Tweaks

  • Stuttering
    If you notice heavy stuttering, launch the game with the included _LaunchWithProcessorAffinity_2Cores_GTA4.bat
    Doing this will assign 2 cores to GTA4 and the rest to Remix.
    If you want a 50/50 split, use _LaunchWithProcessorAffinity_Half_GTA4__Half_Remix.bat

  • Lower Pathtracing settings
    Open the Remix menu by pressing Alt + X and use Graphics Settings Menu at the top.
    Switch to the Graphics tab and adjust the Graphics Preset dropdown to adjust various quality settings

  • Alpha Settings for Trees
    Open the CompMod menu by pressing F4 and open the Rendering Related Settings container under the Game Settings tab.
    Increasing the Tree Alpha Cutout Value value will improve performance but will make leafs look more blocky.


Notes

02

Assets 5
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