GTAO Visuals
This page describes parameters under the "Visuals" foldout that are specific to GTAO mode.
World Space Radius
Defines the maximum distance in meters for occluder search.
For HDRP this corresponds to the Radius of the SSAO override.
For URP this corresponds to the Radius of the native SSAO renderer feature.
Performance impact: moderate
Screen Space Radius
Defines the maximum occluder search radius in pixels. Useful for preserving GTAO visibility at distance, where its World Space Radius naturally shrinks due to perspective. GTAO automatically uses whichever radius is larger (World Space or Screen Space) on a per-pixel basis, ensuring the search area never falls below the specified Screen Space minimum.
Exclude Casting [Unity 6000+]
Excludes objects from casting AO on a per-layer basis via the Rendering Layer Mask. This feature works by clearing the pixels of excluded objects from the local depth buffer used by HTrace AO (while leaving Unity's original depth buffer intact). Objects excluded via this option are displayed as red in the Depth Debug Mode.
To use this feature, make sure that Rendering Layers are enabled: HDRP:
▪ Project Settings → Quality → HDRP → Lighting → Rendering Layer Mask Buffer
▪ Camera → Rendering → Custom Frame Settings → Rendering → Rendering Layer Mask Buffer
▪ Project Settings → Graphics → Pipeline Specific Settings → HDRP → Frame Settings (Default Values) → Camera → Rendering → Rendering Layer Mask Buffer
URP:
▪ Universal Rendering Pipeline Asset → Lighting → Use Rendering Layers
Keep in mind that excluding objects does not make other objects behind them visible to screen-space rays, since this operation only erases data from the depth buffer but cannot restore the information behind the excluded areas.
In URP this feature is available only in Deferred and Deferrred+ rendering paths. You can use Prepass Layer Mask in the Universal Renderer Data as an alternative.
Performance impact: small
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