UnityCACAO-HDRP17/com.unity.render-pipelines.high-definition/Documentation~/fullscreen.md

Fullscreen material

Use the Fullscreen shader in the High Definition Render Pipeline (HDRP) to create a custom effect that appears over the entire screen view. You can use this to create custom post-process and custom pass effects.

Page	Description
Understand Fullscreen materials	Learn about Fullscreen materials in HDRP.
Create a Fullscreen material	Create a Fullscreen Shader Graph or use sample Fullscreen shaders.