forked from BilalY/Rasagar
39 lines
2.7 KiB
Markdown
39 lines
2.7 KiB
Markdown
---
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uid: urp-renderer-feature-screen-space-shadows
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---
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# Screen Space Shadows Renderer Feature
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<br/>*Screen-space shadows in a sample scene.*
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You can add a [Screen Space Shadows Renderer Feature](renderer-feature-screen-space-shadows.md) to a Universal Render Pipeline (URP) renderer. This makes URP use a single render texture to calculate and draw shadows from the main Directional Light, instead of multiple [shadow cascade](https://docs.unity3d.com/Manual/shadow-cascades.html) textures.
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The Screen Space Shadows Renderer Feature doesn't affect how shadows look.
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If your project uses the [Forward Renderer](urp-universal-renderer.md), screen-space shadows might make rendering faster, because the Universal Render Pipeline (URP) doesn't need to access multiple shadow cascade textures.
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Screen-space shadows have the following limitations:
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- URP adds a depth prepass so it can sample the depth texture. This might reduce performance on mobile platforms that use tile-based rendering. Refer to [Depth Priming Mode](urp-universal-renderer.md#rendering) for more information about the depth prepass.
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- URP creates a screen-space shadows texture, which uses more memory.
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<br/>*The screen-space shadows texture for the previous image.*
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## Enable screen-space shadows
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To add screen-space shadows to your project, add the Screen Space Shadows Renderer Feature. Refer to [Add a renderer feature](urp-renderer-feature-how-to-add.md).
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URP doesn't calculate or draw screen-space shadows for transparent objects. URP uses shadow maps for transparent objects instead.
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## View screen-space shadows
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Use the [Frame Debugger](https://docs.unity3d.com/Manual/FrameDebugger.html) to view the render passes that draw shadows. Check the following render passes:
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- **ScreenSpaceShadows**, which creates the screen-space shadows texture.
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- **MainLightShadow**, which creates shadow map textures.
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Check the **DrawOpaqueObjects** render pass to check which shadow texture URP uses to draw shadows on each object.
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<br/>*The Frame Debugger with screen-space shadows enabled. The objects in the **DrawOpaqueObjects** render pass use **_ScreenSpaceShadowmapTexture**.*
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<br/>*The Frame Debugger with screen-space shadows disabled. The objects in the **DrawOpaqueObjects** render pass use **TempBuffer 398 2048x1024** and **TempBuffer 399 2048x2048**, which are shadow map textures from the **MainLightShadow** render pass.*
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