Fixed an issue where rendering preview with MSAA might generate render graph errors.

com.unity.render-pipelines.core/Runtime/RenderGraph/RenderGraph.cs

@@ -372,9 +372,10 @@ public void Execute(ScriptableRenderContext renderContext, CommandBuffer cmd, in
             }
             catch (Exception e)
             {
-                m_ExecutionExceptionWasRaised = true;
                 Debug.LogError("Render Graph Execution error");
-                Debug.LogException(e);
+                if (!m_ExecutionExceptionWasRaised) // Already logged. TODO: There is probably a better way in C# to handle that.
+                    Debug.LogException(e);
+                m_ExecutionExceptionWasRaised = true;
             }
             finally
             {
@@ -836,6 +837,7 @@ void ExecuteRenderGraph(ScriptableRenderContext renderContext, CommandBuffer cmd
                     m_ExecutionExceptionWasRaised = true;
                     Debug.LogError($"Render Graph Execution error at pass {passInfo.pass.name} ({passIndex})");
                     Debug.LogException(e);
+                    throw;
                 }
             }
         }

com.unity.render-pipelines.core/Runtime/RenderGraph/RenderGraphResourceRegistry.cs

@@ -632,11 +632,10 @@ void SetGlobalTextures(RenderGraphContext rgContext, List<TextureHandle> texture
                 var resourceDesc = GetTextureResource(resource);
                 if (resourceDesc.shaderProperty != 0)
                 {
-                    if (resourceDesc.rt == null)
+                    if (resourceDesc.rt != null)
                     {
-                        throw new InvalidOperationException(string.Format("Trying to set Global Texture parameter for \"{0}\" which was never created.\nCheck that at least one write operation happens before reading it.", resourceDesc.desc.name));
+                        rgContext.cmd.SetGlobalTexture(resourceDesc.shaderProperty, bindDummyTexture ? TextureXR.GetMagentaTexture() : resourceDesc.rt);
                     }
-                    rgContext.cmd.SetGlobalTexture(resourceDesc.shaderProperty, bindDummyTexture ? TextureXR.GetMagentaTexture() : resourceDesc.rt);
                 }
             }
         }

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

@@ -668,6 +668,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fix issue causing blocky artifacts when decals affect metallic and are applied on material with specular color workflow.
 - Fixed issue with depth pyramid generation and dynamic resolution.
 - Fixed an issue where decals were duplicated in prefab isolation mode.
+- Fixed an issue where rendering preview with MSAA might generate render graph errors.
 
 ### Changed
 - Improve MIP selection for decals on Transparents