Custom post-processing
The Universal Render Pipeline (URP) provides a variety of pre-built post-processing effects that you can adjust to create a particular visual effect or style. URP also lets you create custom post-processing effects using the Full Screen Pass Renderer Feature. For example, you can implement a grayscale effect to indicate when a player has run out of health.
Scene with no post-processing effects.
Scene with grayscale custom post-processing effect.
The following page describes how to create a custom post-processing effect using the Full Screen Pass Renderer Feature.