Replace Hidden/Internal Shaders

[andyz]

I want to modify some parts of the Hidden/Internal shaders you get when you download the builtin shaders - how do I do this?

[Olmi]

Have you seen this thread?

Altering an internal Hidden shader

Hey! I am using Unity version 2019.3.0a7 Personal on Windows 10. I am trying to alter the shader for the grass of the the built-in Unity terrain system. Many resources (this for example: https://answers.unity.com/questions/1173078/is-it-possible-to-change-shader-of-terrain-details.html) on the internet say that if I just download the shaders (https://unity3d.com/get-unity/download/archive) and place them in my assets folder in my project, they should be overridden if they have the same name…

[andyz]

You can replace sections of the shader pipeline via Project-Settings - Graphics - Built-in Shader Settings.
But it’s unclear how the pipelines are structured otherwise, for example the old Legacy Deferred lets you replace the pre-pass lighting but where is the Final Pass section?