Installing the Post Processing Stack

Before we can use the Post Processing Stack, we must first get it from the newly introduced Package Manager. A Unity package is a single file that contains various assets that can be used in Unity in a similar manner to a .zip file. Previously, Unity used the Asset Store to share these files with users, but as time has gone on, the Package Manager has been added to give users an easy way to get free content from Unity. We will actually be using the Package Manager again in Chapter 12, Shader Graph, but right now we will be using it for the Post-Processing package that it contains.