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Glossary:Downsampling

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Key points

Brute force alternative to Anti-aliasing (AA).
Fully compatible with every game supporting "higher" resolutions
May have all the game-specific downsides of running at higher resolutions (e.g. stretched UI)

Windows

AMD

Enable Virtual Super Resolution (VSR)
Monitor's native resolution had originally[citation needed] to be one of the following: 1920 X 1080 @ 60Hz, 1920 X 1200 @ 60Hz, 2560 x 1440 @ 60Hz, 1920 x 1080 @ 120Hz.[1]
Maximum virtual resolution was originally 5120×2880. Since driver 22.3.2 it is 7680 × 4320.[2]
  1. Open the Control Center.
  2. Switch the view to Advanced Mode.
  3. Choose My Digital Flat Panels from the sidebar.
  4. Check Enable virtual super resolution.
  5. Click Apply.
Enable Custom Resolution

Nvidia

Enable Dynamic Super Resolution (DSR)[3]
Requires GTX 4XX or later.[3] A list of supported GPUs is available here.
This option may not appear until you use GeForce Experience to set a supported game's resolution to a DSR.
You can also set your desktop resolution to a DSR from the resolution configuration in the NVIDIA Control Panel.
  1. Open the NVIDIA Control Panel.
  2. Go to 3D Settings, Manage 3D settings.
  3. Set the DSR Factors and Smoothness.
Disables custom monitor refresh rates forced by custom resolution. As a workaround goto display -> advanced display properties -> monitor settings to set your previously created refresh rate.[4]
Enable Custom Resolution

GeDoSaTo

GeDoSaTo and Borderless Gaming can be used together.
Allows games to be downsampled at any resolution, whenever a configuration file is available.
Each game requires a specific configuration file with specific instructions beforehand, as such most titles may not be supported by default.
Setting Up
  1. Download and install the following setup, outside any of the Program Files directories.
  2. Run the desired game, and navigate to it's Options menu.
  3. Under Resolution, choose a value over the native monitor's resolution.

Example


Notes

Updater/installer may crash. From an administrator command prompt, run REG ADD "HKLM\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" /v SchUseStrongCrypto /t REG_DWORD /d 1 /reg:32[5]
GeDoSaTo may fail to inject itself if it was installed inside any of the Program Files folders.
Certain games such as Valkyria Chronicles may use an external configuration launcher.
Adding New Resolutions[citation needed]
  1. Click on the Edit Settings button.
  2. Add the following line.
renderResolution [YourWidth]x[YourHeight]@[YourFrequency]

Linux

Gamescope

Can be used on both X.org and Wayland.
Setting Up[6]
  1. Install gamescope, e.g. from your destribution repositories.
  2. For Steam games, add gamescope -w 3840 -h 2160 -W 1920 -H 1080 -f -- %command% as a launch option, where 3840 and 2160 are resolution you will be scaled from and 1920 and 1080 are resolutions you will be scaling to.
  3. For non-Steam games, replace %command% with actual executable name and launch them from a script or a terminal.

xpra + run_scaled

Setting Up[7]
  1. Install xpra, e.g. from your destribution repositories, for Ubuntu and similar sudo apt install xpra xvfb.
  2. Clone respository of run_scaled (make sure git is installed): git clone https://github.com/kaueraal/run_scaled.git.
  3. Optionally install the script, cp run_scaled ~/.local/bin/.
  4. Launch the game such as {{{1}}}.

xrandr

Scales the display.
Setting Up[8]
  1. Run xrandr --scale 2x2 (x2 parameter can be omitted[9]) to scale 2x.
  2. You have to choose an output using --output option.

References