: Navigate to %AppData%\Local\FortniteGame\Saved\Config\WindowsClient , open GameUserSettings.ini , and update all ResolutionSizeX/Y and LastUserConfirmedResolutionSizeX/Y values to
: Right-click the desktop, open NVIDIA Control Panel, go to Change resolution > Customize > Create Custom Resolution . Enter (Horizontal) and (Vertical). Stretched Res Pack For 768x500
: Open Radeon Software, navigate to Settings > Display > Custom Resolutions > Create New . open NVIDIA Control Panel
If you are referring to a texture pack or config file for a specific game (like Minecraft or Fortnite), you must also update the game's internal configuration file: Stretched Res Pack For 768x500
: To ensure the image is "stretched" to fill the screen rather than showing black bars, set your scaling mode to Full Screen in the GPU settings. Optimizing Your "Res Pack"