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Make a shader compatible with the Material Validator in the Built-In Render Pipeline

Add code to a custom shader so it appears in the Material Validator window.
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중요
The Built-In Render Pipeline is deprecated and will be made obsolete in a future release.
It remains supported, including bug fixes and maintenance, through the full Unity 6.7 LTS lifecycle.
For more information on migration, refer to Migrating from the Built-In Render Pipeline to the Universal Render Pipeline and Render pipeline feature comparison.
The Material Validator works with any Materials that use Unity’s Standard shader or surface shaders. However, custom shaders require a pass named 
“META”
. Most custom shaders that support lightmapping already have this pass defined. See documentation on Lightmapping and shaders for more details.
Carry out the following steps to make your custom shader compatible with the Material Validator:
  1. Add the following pragma to the meta pass: 
    #pragma shader_feature EDITOR_VISUALIZATION
  2. In the 
    UnityMetaInput
    structure, assign the specular color of the Material to the field called 
    SpecularColor
    , as shown in the code example below.
Here is an example of a custom meta pass:
Pass{    Name "META"     Tags { "LightMode"="Meta" }    Cull Off    CGPROGRAM    #pragma vertex vert_meta    #pragma fragment frag_meta    #pragma shader_feature _EMISSION    #pragma shader_feature _METALLICGLOSSMAP    #pragma shader_feature _ _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A    #pragma shader_feature ___ _DETAIL_MULX2    #pragma shader_feature EDITOR_VISUALIZATION    float4 frag_meta(v2f_meta i) : SV_TARGET    {        UnityMetaInput input;        UNITY_INITIALIZE_OUTPUT(UnityMetaInput, input);        float4 materialSpecularColor = float4(1.0f, 0.0f, 0.0f, 1.0f);        float4 materialAlbedo = float4(0.0f, 1.0f, 0.0f, 1.0f);        input.SpecularColor = materialSpecularColor;        input.Albedo = materialAlbedo;        return UnityMetaFragment(input);    }  }