Improve post process message when creating mismatching shader

Improve missing shader message in custom post process, improve doc, and remove 's' in post process order

Author: Antoine Lelièvre

Packages/com.unity.render-pipelines.high-definition/Documentation~/custom-post-processing-create-apply.md

@@ -14,6 +14,8 @@ HDRP includes a template of each file you need to set up custom post-processing.
   - To create a shader file, go to **Assets** > **Create** > **Shader** and select **HDRP** **Post Process**.
   - To create a [Fullscreen Shader Graph](fullscreen-master-stack-reference.md), go to **Assets** > **Create** > **Shader Graph** > **HDRP** and select **Fullscreen Shader Graph**.
 
+Note that the file name of both the C# post-process volume and the shader need to be the same to work without any modification. If the name doesn't match, you need to update the **kShaderName** property to reflect the actual name of the shader.
+
 This creates each template file in the **Project** window in the **Assets** folder.
 
 <a name="apply-custom-postprocess"></a>

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/CustomPostProcessVolumeComponentEditor.cs

@@ -13,7 +13,7 @@ public class CustomPostProcessVolumeComponentEditor : VolumeComponentEditor
     {
         internal static class Styles
         {
-            public const string helpBoxLabel = "Custom Post Process Orders";
+            public const string helpBoxLabel = "Custom Post Process Order";
             public const string helpBoxMessage = "This Custom Post Process is not registered in ProjectSettings > Graphics.";
         }
 

Packages/com.unity.render-pipelines.high-definition/Editor/PostProcessing/Templates/CustomPostProcessingVolume.template

@@ -23,7 +23,7 @@ public sealed class #SCRIPTNAME# : CustomPostProcessVolumeComponent, IPostProces
         if (Shader.Find(kShaderName) != null)
             m_Material = new Material(Shader.Find(kShaderName));
         else
-            Debug.LogError($"Unable to find shader '{kShaderName}'. Post Process Volume #NAME# is unable to load.");
+            Debug.LogError($"Unable to find shader '{kShaderName}'. Post Process Volume #NAME# is unable to load. To fix this, please edit the 'kShaderName' constant in #NAME#.cs or change the name of your custom post process shader.");
     }
 
     public override void Render(CommandBuffer cmd, HDCamera camera, RTHandle source, RTHandle destination)

Packages/com.unity.render-pipelines.high-definition/Runtime/Settings/CustomPostProcessOrdersSettings.cs

@@ -4,7 +4,7 @@ namespace UnityEngine.Rendering.HighDefinition
 {
     [Serializable]
     [SupportedOnRenderPipeline(typeof(HDRenderPipelineAsset))]
-    [Categorization.CategoryInfo(Name = "Custom Post Process Orders", Order = 30)]
+    [Categorization.CategoryInfo(Name = "Custom Post Process Order", Order = 30)]
     class CustomPostProcessOrdersSettings : IRenderPipelineGraphicsSettings
     {
         #region Version

Packages/com.unity.render-pipelines.high-definition/Samples~/FullscreenSamples/Scripts/Colorblindness.cs

@@ -21,7 +21,7 @@ public colorblindness_Types_Parameter(colorblindness_Types value, bool overrideS
 
     public bool IsActive() => m_Material != null && intensity.value > 0f;
 
-    // Do not forget to add this post process in the Custom Post Process Orders list (Project Settings > Graphics > HDRP Settings).
+    // Do not forget to add this post process in the Custom Post Process Order list (Project Settings > Graphics > HDRP Settings).
     public override CustomPostProcessInjectionPoint injectionPoint => CustomPostProcessInjectionPoint.AfterPostProcess;
 
     const string kShaderName = "HDRPSamples/ColorblindFilter";

Packages/com.unity.render-pipelines.high-definition/Samples~/FullscreenSamples/Scripts/FullscreenSamplesEffectSelection.cs

@@ -93,7 +93,7 @@ void SwitchEffect()
                 infos = "The rain animation is created through a shadergraph rendering on a Double Buffered Custom Render Target.\n This creates an animated texture of water droplets.\nThe animated texture is then used in another Shadergraph on a Fullscreen Custom Pass.\nCodeless.\n\n To note : while in editor and outside of runtime, the double buffered Render Target update timing is not consistant.";
                 break;
             case FullscreenEffectsEnum.ColorblindnessFilter:
-                infos = "Filter that simulates types of Colorblindness.\nThis filter needs to be applied to the final color of the render, after Tonemapping or any other color grading.\nThis is done in Shadergraph by using PostProcessInput of the HDSampleBuffer node, which is only available after Post Process. \nIt means a new Post Process for the Volume Profile needs to be created.\nCustom Post Process are created through C# script, see Colorblindness.cs \n\nThis custom post process needs to be added to the HDRP Global settings \n(Custom Post Process Orders > After Post Process)\n otherwise HDRP won't recognize it.\nThen, Colorblindness will be available as a new Override for Volume Profile under Post-Processing>Custom.";
+                infos = "Filter that simulates types of Colorblindness.\nThis filter needs to be applied to the final color of the render, after Tonemapping or any other color grading.\nThis is done in Shadergraph by using PostProcessInput of the HDSampleBuffer node, which is only available after Post Process. \nIt means a new Post Process for the Volume Profile needs to be created.\nCustom Post Process are created through C# script, see Colorblindness.cs \n\nThis custom post process needs to be added to the HDRP Global settings \n(Custom Post Process Order > After Post Process)\n otherwise HDRP won't recognize it.\nThen, Colorblindness will be available as a new Override for Volume Profile under Post-Processing>Custom.";
                 break;
                 //............................................Add infos of the next effect here
                 //The prefabs to instantiate needs to be added to the array list on the component at the same index