40 lines
2.3 KiB
Markdown
40 lines
2.3 KiB
Markdown
# Screen Space Reflections
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The **Screen Space Reflection** effect creates subtle reflections that simulate wet floor surfaces or puddles. It reflects both static and dynamic GameObjects to create realistic reflections.
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Screen Space Reflection replaces specular highlights on a surface, which makes it an ideal effect to limit the amount of [specular light](https://docs.unity3d.com/Manual/shader-NormalSpecular.html) leaking.
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### Properties
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| Property | Function |
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| :----------------------- | :------------------------------------------------------------ |
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| Preset | Select the quality preset from the dropdown. Use **Custom** to fine tune the quality. |
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| Maximum Iteration Count (`Custom` preset only) | Set the maximum number of steps in the raymarching pass. A higher value creates more reflections. |
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| Thickness (`Custom` preset only)| Set the value of the ray thickness. A lower value detects smaller details but it is resource-intensive. |
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| Resolution (`Custom` preset only)| Select the size of the internal buffer. Select **Downsample** to maximize performance. **Supersample** is slower but produces higher quality results. |
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| Maximum March Distance | Set the maximum distance to draw reflections in the scene. |
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| Distance Fade | Set the value for the distance to fade reflections close to the near plane. This is useful to hide common artifacts. |
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| Vignette | Set the value to fade the reflections close to the screen edges. |
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### Performance
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The `Custom` preset is very resource-intensive and best for beauty shots. If you are developing for consoles, use **Medium** as the maximum, unless you have plenty of GPU time to spare. On lower resolutions you can boost the quality preset and get similar timings with a higher visual quality.
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### Known issues and limitations
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- Screen-space reflections doesn't support AR/VR.
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- [Universal Render Pipeline (URP)](https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@7.5/manual/index.html) do not support Screen Space Reflections.
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### Requirements
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- Compute shader
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- Motion vectors
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- Deferred rendering path
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- Shader Model 5.0
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