If you want to play Call of Duty (2003) and Call of Duty United Offensive in 4K (or Any Resolution) resolution without manually editing config files, follow these simple steps:

• Launch Steam and go to the Library tab.
  
• Find Call of Duty (2003) or Call of Duty United Offensive in your game list.
  
• Right-click on the game you want and select Properties...

• In the General section, scroll down to Launch Options.
  
• Copy and paste the following command into the Launch Options box:

+set r_mode -1 +set r_customwidth 3840 +set r_customheight 2160 +set r_customaspect 1.7 +set cg_fov 105 +seta com_maxfps 120 +seta r_overBrightBits 0.3 +seta com_introplayed "1" +bind F12 "" +seta com_hunkmegs "512"

• Close the Properties window and launch the game.
  
• The game should now run in 4K (or Any Resolution) without any manual file/config edits!

• Adjust r_customwidth and r_customheight to match your screen's resolution.
  
• Additionally, set the cg_fov appropriately for the chosen resolution.
  
• For the best experience, it's recommended to set com_maxfps to match your screen's refresh rate.

Note: I unbound F12 (+bind F12 "") by default since the game's built-in screenshot feature encounters errors at higher resolutions.

This guide will help you configure widescreen resolution for Call of Duty and Call of Duty: United Offensive by editing the configuration files. It covers improving resolution, adjusting the field of view (FOV).

• Open the folder where you installed Call of Duty.
  
• If configuring Call of Duty, navigate to the "main" folder.
  
• If configuring Call of Duty: United Offensive, navigate to the "uo" folder.

Here is an image to guide you on where to correctly find these config files:

• Find and open the following files in a text editor of your choice:
  
• Call of Duty: "config.cfg" and "config_mp.cfg"
  
• United Offensive: "uoconfig.cfg" and "uoconfig_mp.cfg"

Edit or add these lines to match your preferred resolution and performance settings:

seta r_customaspect "1.7"
seta r_customwidth "3840"
seta r_customheight "2160"
seta cg_fov "105"
seta r_mode "-1"
seta com_introplayed "1"
seta com_maxfps "120"
seta com_hunkmegs "512"
bind F12 ""

• Adjust r_customwidth and r_customheight based on your monitor resolution.
  
• Set cg_fov for a better field of view (higher values increase visibility).
  
• com_maxfps limits the frame rate (increase for smoother performance).
  
• com_hunkmegs allocates more memory to the game (higher values improve stability).
  
• I unbound F12 (+bind F12 "") by default since the game's built-in screenshot feature encounters errors at higher resolutions.

• Save the edited files.
  
• Launch the game and check if the settings have been applied.
  
• If changes don’t take effect, set the config files to "Read-only" (Right-click > Properties > Check "Read-only").

This configuration will enhance your gaming experience with better visuals and smoother performance. Enjoy your game!

To correctly set the "r_customaspect" follow this guide:

• Default is 1 (seta r_customaspect "1")
  
• 4:3 uses 1.3 (seta r_customaspect "1.3")
  
• 16:9 uses 1.7 (seta r_customaspect "1.7")
  
• 16:10 uses 1.6 (seta r_customaspect "1.6")
  
• 21:9 uses 2.3 (seta r_customaspect "2.3")
  
• 32:9 uses 3.5 (seta r_customaspect "3.5")

Or divide the resolution's width by height to calculate aspect ratio decimal:

1920 / 1080 = 1.7

This list provides the correct adjustments for FOV and aspect ratio for various standard resolutions.




seta r_customaspect "1.7"
seta r_customwidth "1920"
seta r_customheight "1080"
seta cg_fov "96"


seta r_customaspect "1.7"
seta r_customwidth "2560"
seta r_customheight "1440"
seta cg_fov "100"


seta r_customaspect "1.7"
seta r_customwidth "3840"
seta r_customheight "2160"
seta cg_fov "105"


seta r_customaspect "1.7"
seta r_customwidth "7680"
seta r_customheight "4320"
seta cg_fov "110"



seta r_customaspect "1.6"
seta r_customwidth "1920"
seta r_customheight "1200"
seta cg_fov "98"


seta r_customaspect "1.6"
seta r_customwidth "2560"
seta r_customheight "1600"
seta cg_fov "102"


seta r_customaspect "1.6"
seta r_customwidth "3840"
seta r_customheight "2400"
seta cg_fov "108"






seta r_customaspect "2.3"
seta r_customwidth "2560"
seta r_customheight "1080"
seta cg_fov "105"


seta r_customaspect "2.3"
seta r_customwidth "3440"
seta r_customheight "1440"
seta cg_fov "110"


seta r_customaspect "2.3"
seta r_customwidth "5120"
seta r_customheight "2160"
seta cg_fov "115"



seta r_customaspect "3.5"
seta r_customwidth "5120"
seta r_customheight "1440"
seta cg_fov "130"


seta r_customaspect "3.5"
seta r_customwidth "7680"
seta r_customheight "2160"
seta cg_fov "135"

To achieve higher or desired FPS, you need to adjust the "com_maxfps" in config files.

But, you must first turn off Vsync in the game's settings.

Here’s how to disable Vsync in the game:

• Open the Options menu.
  
• Navigate to the Performance tab.
  
• Locate the setting called "Sync Every Frame" (this is the Vsync option).
  
• Set "Sync Every Frame" to "No" to disable Vsync.

Once Vsync is turned off, you should set "com_maxfps" to match your monitor's supported refresh rate (Hz) for optimal performance:

seta com_maxfps "120"

"DO NOT CHANGE RESOLUTION IN GAME SETTINGS!" (as it may reset your configuration.)


DELETE THE CONFIGURATION FILES, THEN LAUNCH YOUR GAME. NAVIGATE TO THE OPTIONS MENU AND RESET ALL SETTINGS TO DEFAULT. THIS WILL FORCE THE GAME TO REGENERATE FRESH CONFIGURATION FILES, RESTORING EVERYTHING TO ITS ORIGINAL STATE.

If your game doesn't fit your screen or is overflowing try these:

• Right-click on "CoDSP.exe" and select "Properties.".
  
• Navigate to the "Compatibility" tab.
  
• Locate "Change settings for all users" and click on it.
  
• In the opened window, find "Change high DPI settings" and click on it.
  
• Then check the option for "Override high DPI scaling behavior".

Apply these changes to CoDMP.exe, CoDUOSP.exe, and CoDUOMP.exe as well.

• Right-click on your desktop.
  
• Select "Display" settings from the context menu.
  
• Scroll down to the "Scale & layout" section.
  
• Click on the Scale dropdown menu.
  
• From the dropdown options, select 100%.
  
• Apply and Confirm.

To resolve the mouse lag issue while aiming down sights, follow these steps:

• Open the config file located in your game’s directory.
  
• Find the line seta cg_nopredict "1"
  
• Change the value to seta cg_nopredict "0"
  
• Save the changes and close the file.

Explanation:

Setting "cg_nopredict" to "0" disables aim prediction, which can cause mouse lag when aiming down sights. Additionally, this adjustment also helps fix any jittery weapon animations, resulting in a smoother experience.

To reduce stuttering while shooting, follow these steps:

• Open the config file located in your game’s directory.
  
• Locate the line seta r_maxEntLights "8"
  
• Change the value to seta r_maxEntLights "4"
  
• If stuttering continues, lower the value further to seta r_maxEntLights "0"

Important Notes:

Setting "r_maxEntLights" to "0" will eliminate stuttering, but it may cause visual glitches, particularly when firing weapons in the game.

It’s recommended to adjust the value incrementally to balance performance and visual quality.

Lower the "World Dynamic Light Quality" setting:

• In game: go to Options > Performance.
  
• Set World Dynamic Light Quality to "Fastest".

When attempting to save or load a game, the following error appears:

"recursive error after: Hunk_AllocateTempMemory: failed on ..."

To fix this increase memory allocation in the configuration file:

• Open the config file located in your game’s directory.
  
• Find: seta com_hunkmegs "128"
  
• Replace with: seta com_hunkmegs "256" or seta com_hunkmegs "512"
  
• Save and restart the game.

If your monitor dims in fullscreen mode, screenshots appear darker, the game ignores brightness settings, or gameplay recordings using OBS Studio, AMD ReLive, or Nvidia ShadowPlay look too dark regardless of driver or app settings.

You can fix it by adjusting the brightness settings in the configuration file:

• Open the config file located in your game’s directory.
  
• Find the line seta r_overBrightBits
  
• Change the value to seta r_overBrightBits "0"
  
• Apply these values and save the file.
  
• Restart the game and try recording again.

And if the monitor becomes overly bright when using Alt+Tab ↹

• Find the line seta r_ignorehwgamma
  
• Change the value to seta r_ignorehwgamma "1"

To resolve the issue where detailed skyboxes are visible through fog, follow the steps below:

• Open the config.cfg file located in your game’s directory.
  
• Find the line seta r_fastsky
  
• Change the value to seta r_fastsky "1"
  
• Save the changes and close the file.

Explanation:

This fix replaces the detailed skybox with a simplified grey skybox, eliminating the problem of it appearing through fog. Please note, the grey skybox may look out of place, particularly during nighttime missions, but it will resolve the visibility issue caused by the detailed skybox.