Fix for issue with Default material not available when Models are imported at project startup.

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -622,6 +622,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed Wizard check on default volume profile to also check it is not the default one in package.
 - Fix erroneous central depth sampling in TAA.
 - Fixed light layers not correctly disabled when the lightlayers is set to Nothing and Lightlayers isn't enabled in HDRP Asset
+- Fixed issue with Model Importer materials falling back to the Legacy default material instead of HDRP's default material when import happens at Editor startup.
 
 ### Changed
 - Improve MIP selection for decals on Transparents

com.unity.render-pipelines.high-definition/Editor/DefaultScene/HDWizard.Configuration.cs

@@ -9,6 +9,7 @@
 using System.Reflection;
 using System.Collections.Generic;
 using System.IO;
+using UnityEditorInternal;
 
 namespace UnityEditor.Rendering.HighDefinition
 {
@@ -378,9 +379,17 @@ void FixHdrpAssetRuntimeResources(bool fromAsyncUnused)
             if (hdrpAsset == null)
                 return;
 
-            hdrpAsset.renderPipelineResources
-                = AssetDatabase.LoadAssetAtPath<RenderPipelineResources>(HDUtils.GetHDRenderPipelinePath() + "Runtime/RenderPipelineResources/HDRenderPipelineResources.asset");
-            ResourceReloader.ReloadAllNullIn(HDRenderPipeline.defaultAsset.renderPipelineResources, HDUtils.GetHDRenderPipelinePath());
+            var editorResourcesPath = HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset";
+            var objs = InternalEditorUtility.LoadSerializedFileAndForget(editorResourcesPath);
+            hdrpAsset.renderPipelineEditorResources = objs != null && objs.Length > 0 ? objs.First() as HDRenderPipelineEditorResources : null;
+            if (ResourceReloader.ReloadAllNullIn(HDRenderPipeline.defaultAsset.renderPipelineEditorResources,
+                HDUtils.GetHDRenderPipelinePath()))
+            {
+                InternalEditorUtility.SaveToSerializedFileAndForget(
+                    new UnityEngine.Object[] { HDRenderPipeline.defaultAsset.renderPipelineEditorResources },
+                    editorResourcesPath,
+                    true);
+            }
         }
 
         bool IsHdrpAssetEditorResourcesCorrect()

com.unity.render-pipelines.high-definition/Editor/RenderPipeline/Settings/DefaultSettingsPanel.cs

@@ -75,6 +75,13 @@ public void OnActivate(string searchContext, VisualElement rootElement)
             {
                 m_ScrollViewPosition = Vector2.zero;
                 InitializeCustomPostProcessesLists();
+
+                var editorResources = HDRenderPipeline.defaultAsset.renderPipelineEditorResources;
+                if (!EditorUtility.IsPersistent(editorResources))
+                {
+                    var editorResourcesPath = HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset";
+                    HDRenderPipeline.defaultAsset.renderPipelineEditorResources = AssetDatabase.LoadAssetAtPath<HDRenderPipelineEditorResources>(editorResourcesPath);
+                }
             }
 
             void InitializeCustomPostProcessesLists()

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.cs

@@ -6,6 +6,9 @@
 using UnityEngine.Experimental.GlobalIllumination;
 using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.RenderGraphModule;
+#if UNITY_EDITOR
+using UnityEditorInternal;
+#endif
 
 namespace UnityEngine.Rendering.HighDefinition
 {
@@ -563,10 +566,21 @@ void UpgradeResourcesIfNeeded()
                 HDRenderPipeline.defaultAsset.renderPipelineRayTracingResources = null;
             }
 
+            var editorResourcesPath = HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset";
             if (HDRenderPipeline.defaultAsset.renderPipelineEditorResources == null)
-                HDRenderPipeline.defaultAsset.renderPipelineEditorResources
-                    = UnityEditor.AssetDatabase.LoadAssetAtPath<HDRenderPipelineEditorResources>(HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset");
-            ResourceReloader.ReloadAllNullIn(HDRenderPipeline.defaultAsset.renderPipelineEditorResources, HDUtils.GetHDRenderPipelinePath());
+            {
+                var objs = InternalEditorUtility.LoadSerializedFileAndForget(editorResourcesPath);
+                HDRenderPipeline.defaultAsset.renderPipelineEditorResources = objs != null && objs.Length > 0 ? objs.First() as HDRenderPipelineEditorResources : null;
+            }
+
+            if (ResourceReloader.ReloadAllNullIn(HDRenderPipeline.defaultAsset.renderPipelineEditorResources,
+                HDUtils.GetHDRenderPipelinePath()))
+            {
+                InternalEditorUtility.SaveToSerializedFileAndForget(
+                    new Object[]{HDRenderPipeline.defaultAsset.renderPipelineEditorResources },
+                    editorResourcesPath,
+                    true);
+            }
 
             // Upgrade the resources (re-import every references in RenderPipelineResources) if the resource version mismatches
             // It's done here because we know every HDRP assets have been imported before

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipelineAsset.cs

@@ -1,7 +1,10 @@
 using System;
 using System.Collections.Generic;
 using UnityEngine.Serialization;
-
+#if UNITY_EDITOR
+using System.Linq;
+using UnityEditorInternal;
+#endif
 namespace UnityEngine.Rendering.HighDefinition
 {
     enum ShaderVariantLogLevel
@@ -97,7 +100,11 @@ internal HDRenderPipelineEditorResources renderPipelineEditorResources
                 // - cannot rely on OnEnable
                 //thus fallback with lazy init for them
                 if (m_RenderPipelineEditorResources == null || m_RenderPipelineEditorResources.Equals(null))
-                    m_RenderPipelineEditorResources = UnityEditor.AssetDatabase.LoadAssetAtPath<HDRenderPipelineEditorResources>(HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset");
+                {
+                    var objs = InternalEditorUtility.LoadSerializedFileAndForget(HDUtils.GetHDRenderPipelinePath() + "Editor/RenderPipelineResources/HDRenderPipelineEditorResources.asset");
+                    m_RenderPipelineEditorResources = objs != null && objs.Length > 0 ? objs.First() as HDRenderPipelineEditorResources : null;
+                }
+
                 return m_RenderPipelineEditorResources;
             }
             set { m_RenderPipelineEditorResources = value; }