remix runtime update

Edit 12th March 2025:

l4d2-rtx_1.1-829a819.zip

• Added the required source addon left4dead2\addons\l4d2rtx.vpk
  (fixes an artifact on bullet holes when using the flashlight + adds map marker props)

Changelog:

• Update remix runtime to the latest version
  • it includes dlss4 (transformer), proper volumetrics etc.
  • it is a pre-release version so expect some issues
• Removal of launcher because of false-positives
  • Replaced with dxwrapper
• Fix black l4d1 maps by marking all skybox textures + fix decals (rtx.conf)
• Fix rendering of infected on l4d1 maps

Installation:

0. Previous versions

Skip this and proceed with step 1 if you install the compatibility mod for the first time.

• Go into ...\steamapps\common\Left 4 Dead 2\bin\ and remove the .trex folder
• Remove the l4d2-rtx-launcher.exe or comp-rtx-launcher.exe from ``...\steamapps\common\Left 4 Dead 2`

1. Compatibility Mod

1. Download l4d2-rtx_1.1-829a819.zip
2. Copy All contents WITHIN the l4d2-rtx folder Into your Left 4 Dead 2 root folder (see this)

2. Base Remix Mod

1. Download the base remix-mod - repo: (https://github.com/xoxor4d/l4d2-rtx-base-mod)
2. Extract and place the mods folder into the rtx-remix folder found in the L4D2 root folder
   (create the rtx-remix folder if it does not exist) (see this)

Followed by:

• Start the game by executing run-l4d2-rtx.bat (start as admin if game is installed under Program Files)
• The window title should change to Left 4 Dead 2 - RTX - followed by the GitHub commit number if successful

Tip

Check out the readme and the wiki

✳️ Info:

• Please make sure to carefully read the readme on the main page.
• Current releases ship with a custom build of the remix-dxvk runtime which includes necessary changes for L4D2 (bin/.trex/d3d9.dll)

Folder Structure

.  
├─ ...
├─ 📁 steamapps
│  └─📁 common
│     └─📁 Left 4 Dead 2
│       ├── 📜 run-l4d2-rtx.bat
│       ├── 📜 left4dead2.exe
│       ├── 📜 ...
│       │
│       ├── 📁 left4dead2_lv
│       ├── 📁 platform
│       └── 📁 rtx-remix
│           └─📁 mods
│             └─📁 l4d2rtx
│               ├── 📜 _compatibility.usda
│               ├── 📜 _highquality.usda
│               └── ...
└── ...  

First public release

5th March 2025 - False Positive

The launcher is picked up as a false positive by MS defender, again. I've submitted it to MS for manual review and whitelisting (hopefully). There is another way to launch the game with the compatibility mod and that is by using dxwrapper.

• Download the _dxwrapper variant
• Copy All contents Within the l4d2-rtx folder Into your Left 4 Dead 2 root folder (see this)
• Download and install the Base Remix Mod mentioned in step 2
• Instead of launching comp-rtx-launcher.exe, use run-l4d2-rtx.bat

Installation:

1. Compatibility Mod

1. Download l4d2-rtx_1.0-5-g0f8b7e8.zip
2. Copy All contents Within the l4d2-rtx folder Into your Left 4 Dead 2 root folder (see this)

2. Base Remix Mod

1. Download the base remix-mod - repo: (https://github.com/xoxor4d/l4d2-rtx-base-mod)
2. Extract and place the mods folder into the rtx-remix folder found in the L4D2 root folder
   (create the rtx-remix folder if it does not exist) (see this)

Followed by:

• Start the game by executing comp-rtx-launcher.exe (start as admin if game is installed under Program Files)
• The window title should change to Left 4 Dead 2 - RTX - followed by the GitHub commit number if successful

Tip

Check out the readme and the wiki

✳️ Info:

• Please make sure to carefully read the readme on the main page.
• Current releases ship with a custom build of the remix-dxvk runtime which includes necessary changes for L4D2 (bin/.trex/d3d9.dll)

3rd March 2025 - Included hotfixes:

• Fix black l4d1 maps by marking all skybox textures + fix decals (rtx.conf)
• Fix rendering of infected on l4d1 maps
• Reworked the launcher because of false-positives (it's still flagged incorrectly by some AV's)
  • Renamed to comp-rtx-launcher.exe
  • Now comes with a config file named comp-rtx-launcher.toml (the -insecure arg is still hardcoded)

Folder Structure

.  
├─ ...
├─ 📁 steamapps
│  └─📁 common
│     └─📁 Left 4 Dead 2
│       ├── 📜 comp-rtx-launcher.exe
│       ├── 📜 comp-rtx-launcher.toml
│       ├── 📜 left4dead2.exe
│       ├── 📜 ...
│       │
│       ├── 📁 left4dead2_lv
│       ├── 📁 platform
│       └── 📁 rtx-remix
│           └─📁 mods
│             └─📁 l4d2rtx
│               ├── 📜 _compatibility.usda
│               ├── 📜 _highquality.usda
│               └── ...
└── ...