The recommended way to install the plugin is from OpenUPM, but it can also be installed manually.

OpenUPM

1. In Unity, open Edit/Project Settings/Package Manager and add OpenUPM as a Scoped Registry. See openupm.com for further information.

Scoped registries

1. In the Unity Package Manager, click +, then Install package by name....
2. Put net.pixelpart.core into the Name field and the exact required version of the plugin (e.g. 1.8.1) into the Version field. Then, click Install.
3. If the project uses the Universal Rendering Pipeline (URP), additionally install the package net.pixelpart.urp in the same way. Make sure to add net.pixelpart.urp as a Scope in the Package Manager settings beforehand.
4. If the project uses the High-Definition Rendering Pipeline (HDRP), additionally install the package net.pixelpart.hdrp in the same way. Make sure to add net.pixelpart.hdrp as a Scope in the Package Manager settings beforehand.

Manual Install

1. Download the plugin from the Pixelpart website and extract the archive.
2. Start the Unity editor and open the project where you want to use Pixelpart.
3. Install the base plugin package net.pixelpart.core.tgz with the Unity Package Manager. See docs.unity3d.com for more details.
4. If the project uses the Universal Rendering Pipeline (URP), additionally install the package net.pixelpart.urp.tgz.
5. If the project uses the High-Definition Rendering Pipeline (HDRP), additionally install the package net.pixelpart.hdrp.tgz.