Probe Volumes panel properties

This page explains the properties in the Probe Volumes panel in Lighting settings. To open the panel, from the main menu select Window > Rendering > Lighting > Probe Volumes.

Baking

To open Baking Set properties, either select the Baking Set asset in the Project window, or from the main menu select Window > Rendering > Lighting > Probe Volumes tab.

Baking

Property	Description
Baking Mode
	Single Scene	Use only the active scene to calculate the lighting data in Probe Volumes.
	Baking Set	Use the scenes in this Baking Set to calculate the lighting data in Probe Volumes.
Current Baking Set	The current Baking Set asset.
Scenes in Baking Set	Lists the scenes in the current Baking Set. Status: Indicates whether the scene is loaded. Bake: When enabled, HDRP generates lighting for this scene. Use + and - to add or remove a scene from the active Baking Set. Use the two-line icon to the left of each scene to drag the scene up or down in the list.

Probe Placement

Property	Description
Probe Positions
	Recalculate	Recalculate probe positions during baking, to accommodate changes in scene geometry. Refer to Bake different lighting setups with Lighting Scenarios for more information.
	Don't Recalculate	Don't recalculate probe positions during baking. This keeps the probe positions the same as the last successful bake, which means HDRP can blend probes in different Lighting Scenarios. Refer to Bake different lighting setups with Lighting Scenarios for more information.
Min Probe Spacing	The minimum distance between probes, in meters. Refer to Configure the size and density of Probe Volumes for more information.
Max Probe Spacing	The maximum distance between probes, in meters. Refer to Configure the size and density of Probe Volumes for more information.
Renderer Filter Settings
	Layer Mask	Specify the Layers HDRP considers when it generates probe positions. Select a Layer to enable or disable it.
	Min Renderer Size	The smallest Renderer size HDRP considers when it places probes.

Lighting Scenarios

This section appears only if you enable Lighting Scenarios under Light Probe Lighting in the HDRP Asset.

Property			Description
Scenarios			Lists the Lighting Scenarios in the Baking Set. To rename a Lighting Scenario, double-click its name.
	Active		Set the currently loaded Lighting Scenario, which HDRP writes to when you select Generate Lighting.
	Status		Indicates the status of the active Lighting Scenario.
		Invalid Scenario	A warning icon appears if the active Lighting Scenario is baked but HDRP can't load it anymore, for example if another Lighting Scenario has been baked that caused changes in the probe subdivision.
		Not Baked	An information icon appears if you haven't baked any lighting data for the active Lighting Scenario.
		Not Loaded	An information icon appears if scenes in the Baking Set aren't currently loaded in the Hierarchy window, so HDRP can't determine the Lighting Scenario status.

Probe Invalidity Settings

Property	Description
Probe Dilation Settings
	Enable Dilation	When enabled, HDRP replaces data in invalid probes with data from nearby valid probes. Enabled by default. Refer to Fix issues with Probe Volumes.
	Search Radius	Determine how far from an invalid probe HDRP searches for valid neighbors. Higher values include more distant probes that might be in different lighting conditions than the invalid probe, resulting in unwanted behaviors such as light leaks.
	Validity Threshold	Set the ratio of backfaces a probe samples before HDRP considers it invalid. Higher values mean HDRP is more likely to mark a probe invalid.
	Dilation Iterations	Set the number of times Unity repeats the dilation calculation. This increases the spread of dilation effect, but increases the time HDRP needs to calculate probe lighting.
	Squared Distance Weighting	Enable weighing the contribution of neighbouring probes by squared distance, rather than linear distance. Probes that are closer to invalid probes will contribute more to the lighting data.
Virtual Offset Settings
	Enable Virtual Offset	Enable HDRP moving the capture point of invalid probes into a valid area. Refer to Fix issues with Probe Volumes.
	Search Distance Multiplier	Set the length of the sampling ray HDRP uses to search for valid probe positions. High values might cause unwanted results, such as probe capture points pushing through neighboring geometry.
	Geometry Bias	Set how far HDRP pushes a probe's capture point out of geometry after one of its sampling rays hits geometry.
	Ray Origin bias	Set the distance between a probe's center and the point HDRP uses as the origin of each sampling ray. High values might cause unwanted results, such as rays missing nearby occluding geometry.
	Layer Mask	Specify which layers HDRP includes in collision calculations for [Virtual Offset](probevolumes-fixissues.md).
	Refresh Virtual Offset Debug	Re-run the virtual offset simulation to preview updated results, without affecting baked data.

Probe Volume Disk Usage

Property	Description
Scenario Size	Indicates how much space on disk is used by the currently selected Lighting Scenario.
Baking Set Size	Indicates how much space on disk is used by all the baked Light Probe data for the currently selected Baking Set. This includes the data for all Lighting Scenarios, and the data shared by all Lighting Scenarios.