iw3sp-mod-rtx - nvidia RTX Remix compatibility mod

This fork of the singleplayer client modification (iw3sp_mod) for Call of Duty 4: Modern Warfare (IW3)
makes the game compatible with nvidia's rtx-remix. The client is originally based on the IW4x Client

Usage

Easy Install:

1. Download the latest iw3sp-mod-rtx release

• Extract the contents into your cod4 root directory.
• Skip to Step 5 if you are not interested in nightly builds (featuring the latest changes)

Nightly (always up-to-date):

1. Install the latest full release (step above)

2. [rtx only] [optional] Install the latest full rtx-remix release (0.5.1 at this time)
   https://github.com/NVIDIAGameWorks/rtx-remix/tags

3. [rtx only] [optional] Install the latest github action builds of:
   remix bridge - https://github.com/NVIDIAGameWorks/bridge-remix/actions
   remix runtime - https://github.com/NVIDIAGameWorks/dxvk-remix/actions

4. Download the latest iw3sp-mod-rtx github actions build:
   Release-binaries-rtx - https://github.com/xoxor4d/iw3sp-mod-rtx/actions

• Drop game.dll and the contents of the assets-remix folder into your cod4 root directory and start the game.

5. Run iw3sp_mod.exe to start the game

6. Read the Dvars / Console Commands and Current issues sections

Remix section

🔷 To clarify, this client mod is only making CoD4 compatible with remix. 🔷

My actual remix-mod with enhanced materials, meshes and lights can be found over at ModDB:
https://www.moddb.com/mods/cod4-mp-rtx-remix-iw3xo

(the rtx-remix directory contains small and simple sp-specific changes that are not part of the ModDB release) (read the included README)

• A. Commandline Arguments:

  • -no_rtx :: disable rtx modules
  • -no_default_sky :: disable sky spawning (map settings)
  • -no_sun :: disable sun spawning (map settings)
  • -no_fog :: disable fog (map settings)
  • -stock_effects :: render effects using shaders
  • -no_forced_lod :: do not set r_forceLod to high by default
  • -load_normal_spec :: enable loading of specular and normal maps (if you need to for some reason)

• commandline example:  c:\path\iw3sp_mod.exe -no_forced_lod -no_fog

• B. Dvars:

  🟩 encouraged to be tweaked
  🟦 can be useful in edge case scenarios
  🟧 shouldn't be touched

  Culling dvars:

  🟩 rtx_culling_tweak_mins :: prevents a bit of culling
  🟩 rtx_culling_tweak_maxs :: prevents a lot of culling
  🟩 rtx_culling_tweak_frustum :: disables frustum culling
  🟩 rtx_culling_tweak_smodel :: disables static model culling
  🟩 rtx_culling_plane_dist :: distance of frustum culling planes

  General dvars:

  🟩 r_forceLod :: force all models to a specific LOD
  🟩 r_forceLod_second_lowest :: prevent game from using the lowest LOD (sometimes used to hide the model)
  🟩 r_lodScaleRigid :: adjust static model draw distances (lower values increase draw distance)
  🟩 r_showTess :: draws material info (incl. all image names) of surfaces (geometry / models)
  🟩 r_showCellIndex :: show portal index info (useful for manual culling overrides via map settings)
  🟩 r_showModelNames :: draw names of static models around the player

  Dvars that should only be changed if you know what you are doing:

  🟧 rtx_extend_smodel_drawing :: disable static model draw limit (max amount of static models drawn at once)

• C. Console Commands :
  • mapsettings_update :: reload map settings
  • mapsettings_get_defaults :: prints sun direction, color and intensity in map_settings format based on the stock map settings to the consle

map_settings.ini :: root/iw3sp_data

🔸 Tweak sunlight / color, skybox and fog settings
🔸 Override culling per portal / cell (to fix light or shadow culling - dvar r_showCellIndex)
🔸 Spawn unique anchor meshes that can be used to attach unique prims and lights to

⚠️ Current Issues

• Swift changes in geometry (eg. teleporting) can crash the game.

  • Decrease geometry drawing by increasing culling or play with r_lodScaleRigid

• Remix might try to use your onboard gpu (that is a general CoD issue), so its best to disable it in the bios or within the device manager

• Some effects will slow down the game (really depends on the effect and the amount)

Questions?

visit the rtx-remix showcase discord and check out the cod4 thread (remix-projects channel)

• join the iw3xo discord if you have questions related to this modification
• join the iw3sp-mod discord if you have questions related to iw3sp_mod

Credits rtx fork

• people of the showcase discord (for testing, feedback and ideas)
• nvidia - rtx-remix

IW3SP_MOD Features

Mod compatibility list

• Increased asset limits for IW3
  • FX: 1200
  • Image: 7168
  • Loaded Sound: 2700
  • Streamed Sound: 24000
  • Material: 8192
  • Weapon: 2400
  • Xmodel: 5125
• Added game achievements;
• Added gamepad support with aim assist;
• Added custom methods and functions for GSC;
• Added loading of additional .ff files [level name]_patch.ff;
• Added FOV logic from multiplayer to singleplayer;
• Added map entities editing for the stock maps and more (Wiki)

How to install modification? (For regular users)

1. Download the latest release
2. Place the .zip contents into your cod4 root folder
3. Start iw3sp_mod.exe

How to compile from source? (For advanced users)

1. Clone this repository. I recommend using git-scm.
   P.S: (Downloading the zip does not include deps!)
   
2. Find any directory which you want the placed the content of repository, then open context menu and find "Git Bash Here" and write next line in the cmd: git clone https://github.com/xoxor4d/iw3sp-mod-rtx.git
3. After cloning click the generate.bat and wait when all files will be ready.
4. Open build folder and find the iw3sp_dev.sln file and compile.

Credits iw3sp_mod

• Jerry4LT - IW3SP_Mod
• Bogdan Konstantinou
• xoxor4d - IW3xo
• X Labs Team
• AlterWare
• fed - h2-mod
• Nukem9 - LinkerMod
• CoD4X Server/Client
• Vlad Loktionov

[Dependencies]

• ocornut - Dear ImGui
• curl
• juliettef - imgui_markdown
• discord-rpc
• nlohmann - json
• DirectX SDK
• LibTomCrypt
• LibTomMath

Disclaimer

This software has been created purely for the purposes of academic research. Project maintainers are not responsible or liable for misuse of the software. Use responsibly.