Why is PrefabUtility.IsPartOfAnyPrefab(gameObject) returning false even though the object is a prefab?

even though the object is a prefab?

Are you actually sure about that? Keep in mind that when you use Instantiate on a prefab the created clone is not a "prefab" nor a "prefab instance". If you want to create an instance of a prefab inside the editor you have to use PrefabUtility.InstantiatePrefab. We don't know enough about what that "object" is, where it's located, etc ...

@Nate2033 The object we don't know much about I called PrefabContent. When you open "Open" prefab, that's Prefab content, and is same type as any pure GameObject, so PrefabUtility.IsPartOfAnyPrefab(gameObject) returns false. To find out Prefab asset from PrefabContent you should use PrefabUtility.GetCorrespondingObjectFromOriginalSource

The code will help you test your GameObjects in u2019 similar to previous APIs #if UNITY_2019_1_OR_NEWER public enum PrefabType { None = 0, Prefab = 1, ModelPrefab = 2, PrefabInstance = 3, ModelPrefabInstance = 4, MissingPrefabInstance = 5, DisconnectedPrefabInstance = 6, DisconnectedModelPrefabInstance = 7, PrefabContent = 8, Variant = 9 } #endif public static PrefabType GetPrefabType(UnityEngine.Object target) { #if UNITY_2019_1_OR_NEWER if (target is GameObject && PrefabStageUtility.GetPrefabStage(target as GameObject) !=null) return PrefabType.PrefabContent; if (!PrefabUtility.IsPartOfAnyPrefab(target)) { return PrefabType.None; } else { switch (PrefabUtility.GetPrefabInstanceStatus(target)) { case PrefabInstanceStatus.NotAPrefab: switch (PrefabUtility.GetPrefabAssetType(target)) { case PrefabAssetType.Regular: return PrefabType.Prefab; case PrefabAssetType.Variant: return PrefabType.Variant; case PrefabAssetType.Model: return PrefabType.ModelPrefab; } break; case PrefabInstanceStatus.Connected: if (PrefabUtility.IsPartOfModelPrefab(target)) return PrefabType.ModelPrefabInstance; else return PrefabType.PrefabInstance; case PrefabInstanceStatus.Disconnected: if (PrefabUtility.IsPartOfModelPrefab(target)) return PrefabType.DisconnectedModelPrefabInstance; else return PrefabType.DisconnectedPrefabInstance; case PrefabInstanceStatus.MissingAsset: return PrefabType.MissingPrefabInstance; } return PrefabType.None; } #else return PrefabUtility.GetPrefabType(target); #endif }