# Upscaling: render the game at a lower resolution (thus saving performance),
# then upscale the image to the target resolution to regain some of the lost
# visual fidelity.
upscaling:
  # enable (true) or disable (false) upscaling
  enabled: true
  # method to use for upscaling. Available options (all of them work on all GPUs):
  # - fsr (AMD FidelityFX Super Resolution)
  # - nis (NVIDIA Image Scaling)
  # - cas (AMD FidelityFX Contrast Adaptive Sharpening)
  method: cas
  # control how much the render resolution is lowered. The renderScale factor is
  # applied to both width and height. So if renderScale is set to 0.5 and you
  # have a resolution of 2000x2000 configured in SteamVR, the resulting render
  # resolution is 1000x1000.
  # NOTE: this is different from how render scale works in SteamVR! A SteamVR
  # render scale of 0.5 would be equivalent to renderScale 0.707 in this mod!
  renderScale: 0.9
  # configure how much the image is sharpened during upscaling.
  # This parameter works differently for each of the upscaling methods, so you
  # will have to tweak it after you have chosen your preferred upscaling method.
  sharpness: 0.7
  # Performance optimization: only apply the (more expensive) upscaling method
  # to an inner area of the rendered image and use cheaper bilinear sampling on
  # the rest of the image. The radius parameter determines how large the area
  # with the more expensive upscaling is. Upscaling happens within a circle
  # centered at the projection centre of the eyes. You can use debugMode (below)
  # to visualize the size of the circle.
  # Note: to disable this optimization entirely, choose an arbitrary high value
  # (e.g. 100) for the radius.
  radius: 0.6
  # when enables, applies a MIP bias to texture sampling in the game. This will
  # make the game treat texture lookups as if it were rendering at the higher
  # target resolution, which can improve image quality a little bit. However,
  # it can also cause render artifacts in rare circumstances. So if you experience
  # issues, you may want to turn this off.
  applyMipBias: true

# Fixed foveated rendering: continue rendering the center of the image at full
# resolution, but drop the resolution when going to the edges of the image.
# There are four rings whose radii you can configure below. The inner ring/circle
# is the area that's rendered at full resolution and reaches from the center to innerRadius.
# The second ring reaches from innerRadius to midRadius and is rendered at half resolution.
# The third ring reaches from midRadius to outerRadius and is rendered at 1/4th resolution.
# The final fourth ring reaches from outerRadius to the edges of the image and is rendered
# at 1/16th resolution.
# Fixed foveated rendering is achieved with Variable Rate Shading. This technique is only
# available on NVIDIA RTX and GTX 16xx cards.
fixedFoveated:
  # enable (true) or disable (false) fixed foveated rendering
  enabled: true
  # configure the end of the inner circle, which is the area that will be rendered at full resolution
  innerRadius: 0.6
  # configure the end of the second ring, which will be rendered at half resolution
  midRadius: 0.8
  # configure the end of the third ring, which will be rendered at 1/4th resolution
  outerRadius: 1.0
  # the remainder of the image will be rendered at 1/16th resolution

  # when reducing resolution, prefer to keep horizontal (true) or vertical (false) resolution?
  favorHorizontal: true

  # when applying fixed foveated rendering, vrperfkit will do its best to guess when the game
  # is rendering which eye to apply a proper foveation mask.
  # However, for some games the default guess may be wrong. In such instances, you can uncomment
  # and use the following option to change the order of rendering.
  # Use letters L (left), R (right) or S (skip) to mark the order in which the game renders to the
  # left or right eye, or skip a render target entirely.
  #overrideSingleEyeOrder: LRLRLR

# Enabling debugMode will visualize the radius to which upscaling is applied (see above).
# It will also output additional log messages and regularly report how much GPU frame time
# the post-processing costs.
debugMode: false

# Hotkeys allow you to modify certain settings of the mod on the fly, which is useful
# for direct comparsions inside the headset. Note that any changes you make via hotkeys
# are not currently persisted in the config file and will reset to the values in the
# config file when you next launch the game.
hotkeys:
  # enable or disable hotkeys; if they cause conflicts with ingame hotkeys, you can either
  # configure them to different keys or just turn them off
  enabled: true
  # toggles debugMode
  toggleDebugMode: ["ctrl", "f1"]
  # cycle through the available upscaling methods
  cycleUpscalingMethod: ["ctrl", "f2"]
  # increase the upscaling circle's radius (see above) by 0.05
  increaseUpscalingRadius: ["ctrl", "f3"]
  # decrease the upscaling circle's radius (see above) by 0.05
  decreaseUpscalingRadius: ["ctrl", "f4"]
  # increase the upscaling sharpness (see above) by 0.05
  increaseUpscalingSharpness: ["ctrl", "f5"]
  # decrease the upscaling sharpness (see above) by 0.05
  decreaseUpscalingSharpness: ["ctrl", "f6"]
  # toggle the application of MIP bias (see above)
  toggleUpscalingApplyMipBias: ["ctrl", "f7"]
  # take a screen grab of the final (post-processed, upscaled) image.
  # The screen grab is stored as a dds file next to the DLL.
  captureOutput: ["ctrl", "f8"]
  # toggle fixed foveated rendering
  toggleFixedFoveated: ["alt", "f1"]
  # toggle if you want to prefer horizontal or vertical resolution
  toggleFFRFavorHorizontal: ["alt", "f2"]