Tighten managed SRP asset materialization

engine/src/Scripting/Mono/MonoScriptRuntime.cpp

@@ -3013,6 +3013,13 @@ bool MonoManagedRenderPipelineAssetRuntime::EnsureManagedAsset() const {
         return m_ownsManagedAssetHandle;
     }
 
+    if (m_descriptor.HasAssetRef()) {
+        m_runtime->SetError(
+            "Managed render pipeline asset selected by AssetRef has no serialized asset graph; refusing class-default materialization: " +
+            m_descriptor.GetFullName() + ".");
+        return false;
+    }
+
     MonoClass* assetClass = nullptr;
     if (!m_runtime->ResolveManagedClass(
             m_descriptor.assemblyName,
@@ -9063,27 +9070,10 @@ bool MonoScriptRuntime::TryEnsureManagedRenderPipelineAssetHandle(
         return true;
     }
 
-    MonoClass* assetClass = nullptr;
-    if (!ResolveManagedClass(
-            ioDescriptor.assemblyName,
-            ioDescriptor.namespaceName,
-            ioDescriptor.className,
-            assetClass) ||
-        assetClass == nullptr) {
-        return false;
-    }
-
-    if (!IsMonoClassOrSubclass(
-            assetClass,
-            m_scriptableRenderPipelineAssetClass)) {
-        SetError(
-            "Managed render pipeline asset must derive from ScriptableRenderPipelineAsset: " +
-            ioDescriptor.GetFullName() + ".");
-        return false;
-    }
-
-    return CreateExternalManagedObject(assetClass, ioDescriptor.managedAssetHandle) &&
-           ioDescriptor.managedAssetHandle != 0u;
+    SetError(
+        "Configured managed render pipeline asset has no serialized asset graph; refusing GraphicsSettings class-default materialization: " +
+        ioDescriptor.GetFullName() + ".");
+    return false;
 }
 
 void MonoScriptRuntime::DestroyExternalManagedObject(uint32_t gcHandle) {