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SSGI

This section contains settings related to Screen-Space Global Illumination (SSGI).

Global Illumination Settings

Enabled Toggles SSGI on and off. It enables indirect illumination in the scene.
Preset Quality preset of SSGI.
  • Raytracing — raytracing calculations for SSGI are enabled
  • Raytracing + Denoise — raytracing calculations along with the noise reduction for SSAO are enabled
  • Custom — adjust the feature's quality manually
Notice
Presets override user-defined custom settings. When any preset other than Custom is active, modification of the parameters via API has no effect. The parameter value set via the last API call shall be used only when the Custom preset is active. When checking the current parameter value via API you'll get the corresponding setting stored in the active preset (default or custom one).

Customizable Settings#

The following settings are available when the Custom preset is selected.

SSGI custom settings

Screen-Space Global Illumination Settings
Intensity Brightness of illumination:
  • By the minimum value of 0, the illumination is the darkest.
  • By the maximum value of 1, the illumination is the brightest.
Intensity = 0.2
Intensity = 0.2
Intensity = 1
Intensity = 1
Intensity Boost Increases the SSGI intensity by raising the value to the specified power.
  • The power of 1 (no boost).
  • The power of 2.
  • The power of 3.
  • The power of 4.
Color Clamping Intensity Intensity of TAA color clamping at zero pixel velocity:
  • lower values result in more accumulated frames combined, which reduces noise flickering, but increases ghosting effect (to reduce ghosting in this case you can use the Color Clamping Velocity parameter).
  • higher values up to 1 (default) reduce ghosting effect, but increase flickering
Color Clamping Velocity Sensitivity of TAA color clamping to pixel velocity change. This parameter is used to reduce ghosting effect for lower Color Clamping Intensity values: it automatically increases clamping intensity for higher velocities, and disables clamping for low velocity values.
Threshold Threshold for the ray-traced SSGI calculation.

Denoise Options#

Denoise Toggles noise reduction for the SSGI effect on and off.
Radius Radius of the area to be affected by noise reduction.
Quality Noise reduction quality level defining the number of samples used:
  • Low — low quality
  • Medium — medium quality
  • High — high quality
  • Ultra — ultra quality
Higher values provide better reduction, but for a performance cost (choosing Medium is enough in most cases).
Intensity Noise reduction intensity: higher values provide a less noisy, but more blurred result.
Gaussian Sigma Sigma parameter of Gaussian blur used for noise reduction. This parameter controls the amount of blur applied.
Threshold Threshold value for color difference of neighboring pixels: blur is applied when the color difference is less than the threshold value.
Notice
Setting too high values result in blurring the whole image.
Last update: 2021-04-29
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