Universal Screen Space Reflection

mseonKim/URP-ScreenSpaceReflection 53

Screen Space Reflection brings high-quality reflections to URP, ported from Unity's HDRP implementation. Supports URP 2022 LTS and later, with native RenderGraph implementation for Unity 6. Configure reflections through renderer features and customizable settings, with full compatibility across forward and deferred rendering paths.

com.unity.universal-screenspacereflection

urp screen-space-reflection rendering shader visual-effects render-graph

Install via UPM

Add to Unity Package Manager using this URL

https://www.pkglnk.dev/universal-screenspacereflection.git

README Markdown

Copy this to your project's README.md

Style

Preview

## Installation

Add **Universal Screen Space Reflection** to your Unity project via Package Manager:

1. Open **Window > Package Manager**
2. Click **+** > **Add package from git URL**
3. Enter:
```
https://www.pkglnk.dev/universal-screenspacereflection.git
```

[![pkglnk](https://www.pkglnk.dev/badge/universal-screenspacereflection.svg?style=pkglnk)](https://www.pkglnk.dev/pkg/universal-screenspacereflection)

Dependencies (1)

Render Pipeline Core 14.0.0

README

Universal ScreenSpace Reflection

SSR Sample

This repository is ported from Unity HDRP ScreenSpace Reflection.

This package is available on URP from 2022.3.0f1 (2022 LTS) version. The RenderGraph path for Unity6 is also supported.

	2022 LTS	2023	Unity 6
URP Compatibility	O	O	O
RenderGraph Implementation	X	X	O

How To Use

HowToUse

Add ScreenSpaceReflection renderer feature to the Renderer Data asset. (Disable Native RenderPass in this asset if visible.)
Set the rendering path to your rendering mode.
Link the settings asset to the renderer feature. (You can create the settings asset via Create/UniversalSSR/Settings.)

In Forward(+) Rendering Mode

Since the URP Default Lit shader does not save the smoothness value to the normal texture in Forward Rendering, we need to customize DepthNormalsPass. It also means that we need to customize all shaders that we want to draw the reflection for forward.

However, it's pretty simple to handle this with a custom shader that stores the smoothness value into _CameraNormalsTexture.a. See the reference shader(SSRForwardLit.shader) in the sample project.

Note) Unfortunately, shaders created with ShaderGraph are not supported as there's no way to customize the DepthNormalsPass without customizing the URP package.

Limitations

XR Not supported.
Transparent Objects Not supported.
ShaderGraph shaders are not reflected in Forward(+) rendering.

Differences from HDRP

Assume SSR_APPROX keyword is enabled. (No support PBR Accumulation mode due to performance.)
Stencil Check is excluded.
ClearCoatMask is excluded since it's only in HDRP.
Motion Vector is excluded.

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