35 lines
3.6 KiB
Markdown
35 lines
3.6 KiB
Markdown
# Gradient Sky
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The Gradient Sky Volume component override controls settings relevant to rendering a simple representation of the sky. It allows you to define three colors, the **Top**, **Middle**, and **Bottom**, which HDRP interpolates between to create a gradient sky.
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You can alter these values at runtime. This component also exposes options that enable you to define how HDRP updates the indirect lighting the sky generates in the Scene.
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## Using Gradient Sky
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**Gradient Sky** uses the [Volume](Volumes.md) framework, so to enable and modify **Gradient Sky** properties, you must add a **Gradient Sky** override to a [Volume](Volumes.md) in your Scene. To add **Gradient Sky** to a Volume:
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1. In the Scene or Hierarchy view, select a GameObject that contains a Volume component to view it in the Inspector.
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2. In the Inspector, navigate to **Add Override > Sky** and click on **Gradient Sky**.
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After you add a **Gradient Sky** override, you must set the Volume to use **Gradient Sky**. The [Visual Environment](Override-Visual-Environment.md) override controls which type of sky the Volume uses. In the **Visual Environment** override, navigate to the **Sky** section and set the **Type** to **Gradient Sky**. HDRP now renders a **Gradient Sky** for any Camera this Volume affects.
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[!include[](snippets/volume-override-api.md)]
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## Properties
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[!include[](snippets/Volume-Override-Enable-Properties.md)]
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| Property | Description |
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| ---------------------- | ------------------------------------------------------------ |
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| **Top** | Use the color picker to select the color of the upper hemisphere of the sky. |
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| **Middle** | Use the color picker to select the color of the horizon. |
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| **Bottom** | Use the color picker to select the color of the lower hemisphere of the sky. This is below the horizon. |
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| **Gradient Diffusion** | Set the size of the **Middle** property in the Skybox. Higher values make the gradient thinner, shrinking the size of the **Middle** section. Low values make the gradient thicker, increasing the size of the **Middle** section. |
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| **Intensity Mode** | Use the drop-down to select the method that HDRP uses to calculate the sky intensity.<br />• **Exposure**: HDRP calculates intensity from an exposure value in EV100.<br />• **Multiplier**: HDRP calculates intensity from a flat multiplier. |
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| - **Exposure** | Set the amount of light per unit area that HDRP applies to the HDRI Sky cubemap.<br />This property only appears when you select **Exposure** from the **Intensity Mode** drop-down. |
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| - **Multiplier** | Set the multiplier for HDRP to apply to the Scene as environmental light. HDRP multiplies the environment light in your Scene by this value.<br />This property only appears when you select **Multiplier** from the **Intensity Mode** drop-down. |
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| **Update Mode** | Use the drop-down to set the rate at which HDRP updates the sky environment (using Ambient and Reflection Probes).<br />• **On Changed**: HDRP updates the sky environment when one of the sky properties changes.<br />• **On Demand**: HDRP waits until you manually call for a sky environment update from a script.<br />• **Realtime**: HDRP updates the sky environment at regular intervals defined by the **Update Period**. |
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| - **Update Period** | Set the period (in seconds) for HDRP to update the sky environment. Set the value to 0 if you want HDRP to update the sky environment every frame. This property only appears when you set the **Update Mode** to **Realtime**. |
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