Install via UPM

Add to Unity Package Manager using this URL

https://www.pkglnk.dev/urpssrpackage.git

README Markdown

Copy this to your project's README.md

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## Installation

Add **Unity URP SSR** 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/urpssrpackage.git
```

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

README

Unity-ScreenSpaceReflections-URP

SSR solution for Unity URP. Supports Linear Tracing and Hi Z tracing. The package includes SSR render feature and Hierarchical Min-Z Depth Buffer render feature. Created by Joshua Lim

9/10/23 4.2.0 - 4.1.0 changelog

New Features

Improved glossy reflections
Added downsampling settings for hi-z trace mode

Support this project

Donation link Here

Images

enter image description here

Installation Instructions:

Instructions:

Copy: "https://github.com/JoshuaLim007/Unity-ScreenSpaceReflections-URP.git"
Go into the package manager in unity
Select "add package from git url"
Paste the link into the text entry
Press "add"

Requirements:

Unity URP 12 or newer
Unity 2021 LTS or newer

In your URP Asset SSR ScreenShot 1

Tracing Modes

Linear Tracing
Hi-Z Tracing

enter image description here Hi Z tracing requires "Depth Pyramid" render feature to be added in the pipeline asset. The Depth Pyramid is included in this package.

API:

enter image description here

Changing settings during runtime

void LimSSR.SetSettings(ScreenSpaceReflectionsSettings o)

o.StepStrideLength = The length of each ray march stride. Increasing this will reduce image quality but allow for further objects to be visible in the reflections.
o.MaxSteps = The number of steps the shader does before ending the ray march. Increasing this will allow further objects to be visible in the reflections but reduce performance.
o.Downsample = The number of times the working resolution is downscaled. Increasing this will reduce image quality but increase performance.
o.MinSmoothness = The minimum smoothness of a material has to be in order to have reflections.

For the best quality, try to minimize StepStrideLength and maximize MaxSteps

bool LimSSR.Enabled

True: Enables effect
False: Disables effect

Enables or disables the SSR shader

static RaytraceModes TracingMode

Sets the tracing mode: Linear tracing, or Hi Z tracing

Known Limitations and bugs

Wider apart the near and far clip plane, more banding artifact appears.
Far reflections are inaccurate and have banding artifact.
Transparent objects cannot have reflections.
Transparent objects are not correctly reflected onto objects.
Downsampling ssr on hi-trace mode causes it to break.
Current fix for non-power of 2 resolutions causes warping around edges of objects with a reflection behind it.
Hi-z trace cannot have camera facing reflections.
No support for VR and Mobile devices

Resources and References

Screen Space Reflection | 3D Game Shaders For Beginners (lettier.github.io)

Screen Space Reflections : Implementation and optimization – Part 1 : Linear Tracing Method – Sugu Lee (wordpress.com)

Screen Space Reflections : Implementation and optimization – Part 2 : HI-Z Tracing Method – Sugu Lee (wordpress.com)

Unity URP SSR