Create prefab from model in AssetPostprocessor without losing mesh connections?

Questions & Answers
1

I’m trying to create a prefab from a model in OnPostprocessModel. The prefab gets created and the model hierarchy is added but the Meshes in the Meshfilters are all set to None. Can anyone explain this behaviour?

What I do is basically this:

  public void OnPostprocessModel(GameObject go) {
      PrefabUtility.CreatePrefab("Assets/test.prefab", go);
  }

,

3

I had this same problem just today - surprisingly close to you!

I figured you have the save the prefab’s meshes again.
This fixed it for me:

MeshFilter[] mfs = toPrefab.GetComponentsInChildren<MeshFilter>();
				foreach(MeshFilter mf in mfs) {
					Debug.Log("Saving mesh: "+mf.name +"_M" ); 	
					char[] invalids = System.IO.Path.GetInvalidFileNameChars();
					String newName = String.Join("_", mf.name.Split(invalids, StringSplitOptions.RemoveEmptyEntries) ).TrimEnd('.');
					AssetDatabase.CreateAsset(mf.mesh, "Assets/TempPrefabs/SavedMesh/" + newName +"_M" + ".asset");
				}


				PrefabUtility.CreatePrefab("Assets/TempPrefabs/Resources/"+toPrefab.gameObject.name+".prefab",toPrefab.gameObject,ReplacePrefabOptions.ReplaceNameBased);
2

public Transform prefab;
void Start() {
Instantiate(prefab, new Vector3(0, 0, 0), Quaternion.identity);
}
reference this

4

Any references to game objects or meshes will become invalid after the import has been completed. Thus it is not possible to create a new prefab in a different file from OnPostprocessModel that references meshes in the imported fbx file.

Please try the OnPostprocessAllAssets method.

static void OnPostprocessAllAssets (string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths)
    {
        foreach (string assetPath in importedAssets)
        {
			if (assetPath.Contains("Your target asset path") && System.IO.Path.GetExtension(assetPath) == "Your target asset extension")
            {
               var go =  (GameObject)AssetDatabase.LoadAssetAtPath(assetPath, typeof(GameObject));
               PrefabUtility.CreatePrefab("Assets/test.prefab", go);
            }
        }
    }