To add post processing effects to a Unity project, you’ll need to install the post processing package, add a post processing volume to the scene, and add a post processing layer to the camera:
1. Install the Post Processing package from the Package Manager
You’ll find the Post Processing package in the Unity registry.
2. Add a Post Processing Volume to the scene
Do this by adding a Post Processing Volume component to a game object in the scene. This allows you to apply processing effects to a particular area, or to the entire scene using the global checkbox.
3. Create a Post Processing Profile
A Post Processing Profile is an asset that contains the configuration of effects that a particular post processing volume will use. Because it is an asset it’s possible to apply the same post processing profile to multiple areas without needing to recreate it. To create a new post processing profile, use the New button to the right of the Profile field on the post processing volume component. You will then be able to add, and enable specific effects.
Note: By default, no effects are added and, even when they are, their settings are disabled by default. You will need to enable individual effect parameters in order to use an effect.
4. Set the layer of the Post Processing Volume
Create a new layer for post processing effects with the Add Layer button found at the top of the inspector. Call the layer PostProcessing, and then set the post processing volume object’s later to match.
5. Add a Post Processing Layer to the Camera
Cameras will not use post processing effects by default. In order to display post processing with a particular camera, such as the main camera for example, you’ll need to add a Post Processing Layer component to the camera’s object.
6. Set the Post Processing Layer’s layer field to the same layer as the Post Processing Volume
In the Layer property of the Post Processing Layer component, select the same layer as the post processing volume that you wish to use on this camera.