Cloud Layer Volume Override reference

The Cloud Layer Volume Override lets you configure a simple representation of clouds.

Properties

To edit properties in any Volume component override, enable the checkbox to the left of the property. This also tells HDRP to use the property value you specify for the Volume component rather than the default value. If you disable the checkbox, HDRP ignores the property you set and uses the Volume’s default value for that property instead.

Property	Description
Opacity	The global opacity of the cloud layer. A value of 0 makes clouds completely transparent.
Upper Hemisphere Only	Indicates whether the Cloud Layer exclusively renders above the horizon or not. When enabled, HDRP still uses the entire Cloud Map texture, but the clouds will be renderer above the horizon.
Layers	The number of cloud layers to render. Each layer has its own set of properties. The options are: • 1: Renders a single cloud layer. • 2: Renders two cloud layers.
Resolution	The resolution of the texture HDRP uses to bake the clouds.

Per-layer

The Inspector shows the following properties for each cloud layer. The Layers property determines the number of cloud layers to render.

Property	Description
Cloud Map	Assign a Texture that HDRP uses to render the cloud layer. For more information about the cloud map, see about the cloud map.
- Opacity R	The opacity multiplier to apply to the Cloud Map's red channel.
- Opacity G	The opacity multiplier to apply to the Cloud Map's green channel.
- Opacity B	The opacity multiplier to apply to the Cloud Map's blue channel.
- Opacity A	The opacity multiplier to apply to the Cloud Map's alpha channel.
Altitude	The altitude of the Cloud Layer in meters, used to calculate the sun light attenuation.
Rotation	The angle to rotate the Cloud Layer texture by, in degrees.
Tint	The color HDRP uses to tint the clouds.
Exposure Compensation	The exposure compensation of the clouds in EV relative to the main directional Light.
Wind	Specifies the method HDRP uses to simulate wind. • None: No wind. • Horizontal: HDRP distorts the clouds using a uniform horizontal wind direction. • Flowmap: HDRP distorts the clouds using the Flowmap texture.
- Orientation	The orientation of the wind relative to the X world vector (in degrees). This value can be relative to the Global Wind Orientation defined in the Visual Environment.
- Speed	The wind speed in kilometers per hour. This value can be relative to the Global Wind Speed defined in the Visual Environment.
- Flowmap	The flowmap HDRP uses to distort UVs when rendering the clouds. For more information about the flowmap, see controlling cloud movement. This property only appears when you select Flowmap from the Distortion drop-down.
Raymarching	Indicates whether HDRP calculates lighting for the clouds using the main directional light. When enabled, HDRP uses 2D raymarching on the Cloud Map to approximate self-shadowing from the sun light. The lighting computations are baked inside a texture and only recomputed when any of the relevant parameter changes.
- Steps	The number of raymarching steps HDRP uses to calculate lighting for the clouds. The higher the value, the greater the travelled distance is.
- Density	The density of the clouds. The larger the value, the darker the clouds will appear.
- Ambient Probe Dimmer	Controls the influence of the ambient probe on the cloud layer volume. A lower value will suppress the ambient light and produce darker clouds overall.
Cast Shadows	Indicates whether clouds cast shadows for the main directional light. This calculates the shadow texture and sets it as the light cookie for the main direction Light.

Shadows Property	Description
Shadow Multiplier	The opacity of the cloud shadows. The higher the value, the darker the shadows.
Shadow Tint	The tint HDRP applies to the cloud shadows.
Shadow Resolution	The resolution of the cloud shadows texture.
Shadow Size	The size of the projected cloud shadows.