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Release 1.5.1

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@github-actions github-actions released this 30 Aug 21:16
v1.5.1
8f69985
Screenshot 2026-08-30 114240

Changelog 1.5.1

  • Updated remix runtime to very latest commit which now officially has DLSS RR 4.5

  • Cherry picked lunks DLSS 5 (Neural Rendering) commit: lunks/dxvk-remix-plus-dlssnr@fc4de14

    • This release does not ship any unofficial dll's.
      If you want to use DLSS 5, you'll need to provide your own nvngx_dlssnr.dll (see install instructions)

  • Numos sky system: slower / smoother sunrise & sunset + slightly adjusted times

  • Fixed an issue with the sun / moon getting stuck

  • rtx.conf: ignored Vlad's hair decal which sometimes produced holes

  • Disabled SSS on roman for now to fix cutscene issues

  • The toggle batch now also renames the img files in update folder

  • Installer now renames user.conf on updates (sorry there will be incorrect settings in yours, so please start fresh)

  • Installer now has proper zip extraction error logging

  • Some fixes in the remix_vars module

Screenshot 2026-08-30 115358

Installation:

Install using the installer:

  1. Download GTAIV-Remix-CompatibilityMod-1.5.1.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

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

  5. If this is your first time installing, the installer will ask if you want to install a custom Fork of FusionFix

    • Press YES - 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 but highly recommended.

  6. The installer will ask you if you want to download the required base-remix-mod.

    • Press YES - The CompMod will not function correctly without it - so make sure to install it.
    • Use the GIT install method (recommended) because its easier and faster to update to new versions (and uses less bandwidth)

  7. The installer will ask you if you want to download the optional gta4-autopbr-mod.

    • This mod converts a bunch of game materials to approximated PBR-materials and makes the game less plasticy. It is entirely optional.

  8. Make sure that you remove all custom launch arguments for GTAIV in Steam (if you have any set and use Steam to run the game)


Important

If you want to use DLSS 5 (NR), you'll need to source and place nvngx_dlssnr.dll into the .trex folder on your own.
You can then use the NR settings found within the Post-Processing tab (Alt+X - Advanced Menu)

dlssnr

Tip

You can re-run the installer at any time and choose to only check for remix-base-mod or AutoPBR updates.
If you've used the GIT installation method, it will do delta updates and pull the latest changes.
The base mod (textures/meshes) is getting constant updates which are not coupled to Compatibility Mod releases.


OR Install manually (no need to do this if you've used the installer):

  1. Download GTAIV-Remix-CompatibilityMod-1.5.1.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 rtx-remix fork of it.
    You can find the files inside _installer_options/FusionFix_RTXRemixFork. Extract the plugins & update into your GTAIV directory and override any existing files.
    You may also want to use GTAIV.EFLC.FusionFix.cfg from either mode_fullscreen/plugins or mode_windowed/plugins.

  4. Download gta4-rtx-base-mod

  5. Extract the mods folder (inside of gta4-rtx-base-mod-master) into your rtx-remix folder so that the folder structure looks like this:

.  
├─ ...
├─ 📁 steamapps
│  └─📁 common
│     └─📁 Grand Theft Auto IV
│       └─📁 GTAIV
│         ├── 📜 a_gta4-rtx.asi
│         ├── 📜 d3d9.dll
│         ├── 📜 GTAIV.exe
│         ├── 📜 ...
│         │
│         ├── 📁 rtx_comp
│         └── 📁 rtx-remix
│             └─📁 mods
│               └─📁 gta4rtx
│                 ├── 📜 comp_cars.usda
│                 ├── 📜 comp_effects.usda
│                 ├── 📜 mod.usda
│                 └── ...
└── ...

Usage and general Info

  • Run the game like normal or use the provided batch files (mentioned in the Wiki further down) if you notice heavy stuttering.
  • Press Alt + X to open the Remix menu
  • Press F4 to open the Compatibility Mod menu

Toggling the Sky System

  • Press F4 and toggle Use Remix Atmosphere System


Note

Troubleshooting / Guides -- Look into the Wiki if you are having issues:
https://github.com/xoxor4d/gta4-rtx/wiki/Troubleshooting---Guides

The release includes a custom remix runtime build that contains a few necessary changes. Info about the changes can be found here:
https://github.com/xoxor4d/gta4-rtx/wiki#remix-runtime-changes-and-differences-in-usage

Important

Installer False-Positive: If you get a false positive on the installer, download and use the Installer that shipped with
1.3.2 or the one shipped with 1.4.0

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