Loaded Assetbundle is not rendered

Well, I load an AssetBundle in the Editor to test it out (using Load and LoadAsync). Both ways the AssetBundle content gets instantiated as it should. Only problem everything is greyed out in the hierarchy as if it was deactivated and nothing is rendered. However all instatiated GameObjects are active and their MeshRenderer is active as well.
I have no chance changing any attribute of the GameObjects to make them visible.

What could be the problem here?

Hopefully you figured this out by now, but I just had the same issue.

What you need to do is call Instantiate on the game object after you load it from the AssetBundle… eg my code is something like this:

			AssetBundleRequest assetBundleRequest = bundle.LoadAsync(data.objectName, typeof(GameObject));
			yield return assetBundleRequest;

			GameObject go = (GameObject) Instantiate(assetBundleRequest.asset);

			go.transform.transform.parent = this.transform;