Select a shader parameter from a shader, material or renderer. (Requires Unity 2021.2+)

For string, it will save the name. For int, it will save the hash.

Parameters:

• [Optional] string name: the target. Be a property or a callback that returns a shader, material or renderer. When omitted, it will try to get the Renderer component from the current component.
• [Optional] ShaderPropertyType propertyType: filter the shader parameters by type. Omitted to show all types.
• [Optional] int index=0: which material index to use when the target is a Renderer.

[ShaderParam] public string shaderParamString;
[ShaderParam(0)] public int shaderParamInt;
[ShaderParam(ShaderPropertyType.Texture)] public int shaderParamFilter;

[Separator("By Target")]
[GetComponent] public Renderer targetRenderer;

[ShaderParam(nameof(targetRenderer))] public int shaderParamRenderer;

private Material GetMat() => targetRenderer.sharedMaterial;
[ShaderParam(nameof(GetMat))] public int shaderParamMat;

private Shader GetShader() => targetRenderer.sharedMaterial.shader;
[ShaderParam(nameof(GetShader))] public int shaderParamShader;

It works with ShowInInspector

[ShowInInspector, ShaderParam]
public int ShowShaderParamInt
{
    get => shaderParamInt;
    set => shaderParamInt = value;
}

It works with ShowInInspector/Button parameters and return value

[ShowInInspector]
private string ShowShaderParam([ShaderParam] string shaderS) => shaderS;

[Button]
private string ShowShaderParam([ShaderParam] string shaderS) => shaderS;