Unity后处理PostProcessEffectRenderer在编辑器中显示，但不在构建中显示

Question

将一个PostProcessEffectRenderer实现添加到Unity后处理堆栈后，效果在Unity编辑器中完美运行，但不会在构建的游戏中显示。

对构建质量的更改无效，使用最高质量设置无法显示效果，为Windows x86_64构建。

Grayscale.cs

using System;
using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

[Serializable]
[PostProcess(typeof(GrayscaleRenderer), PostProcessEvent.AfterStack, "Custom/Grayscale")]
public sealed class Grayscale : PostProcessEffectSettings

    [Range(0f, 1f), Tooltip("Grayscale effect intensity.")]
    public FloatParameter blend = new FloatParameter  value = 0.5f ;


public sealed class GrayscaleRenderer : PostProcessEffectRenderer<Grayscale>

    public override void Render(PostProcessRenderContext context)
    
        var sheet = context.propertySheets.Get(Shader.Find("Hidden/Custom/Grayscale"));
        sheet.properties.SetFloat("_Blend", settings.blend);
        context.command.BlitFullscreenTriangle(context.source, context.destination, sheet, 0);

Grayscale.shader

Shader "Hidden/Custom/Grayscale"

    HLSLINCLUDE

        #include "Packages/com.unity.postprocessing/PostProcessing/Shaders/StdLib.hlsl"

        TEXTURE2D_SAMPLER2D(_MainTex, sampler_MainTex);
        float _Blend;

        float4 Frag(VaryingsDefault i) : SV_Target
        
            float4 color = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord);
            float luminance = dot(color.rgb, float3(0.2126729, 0.7151522, 0.0721750));
            color.rgb = lerp(color.rgb, luminance.xxx, _Blend.xxx);
            return color;
        

    ENDHLSL

    SubShader
    
        Cull Off ZWrite Off ZTest Always

        Pass
        
            HLSLPROGRAM

                #pragma vertex VertDefault
                #pragma fragment Frag

            ENDHLSL