This code works in the Unity Editor, but will provide a blank texture in IOS. Any ideas?

Texture2D mVideoBackgroundTexture = (Texture2D) VuforiaRenderer.Instance.VideoBackgroundTexture;

Texture newTexture = Instantiate (mVideoBackgroundTexture);

ideaRawPhoto.texture = newTexture;

ideaRawPhoto.material.mainTexture = newTexture;