I'm guess we managed to corrupt something, question is how do you fix it? I forget when or how, but I was importing some data packages for a project, then cleaning them up by removing stuff, replacing prefabs, etc. One day I started getting this information(Not warning or error) in the log at seemingly random times reading: A tree couldn't be loaded because the prefab is missing UnityEngine.Debug:Log(Object, Object) UnityEngineInternal.Prototype:.ctor(GameObject, Single) UnityEngineInternal.TreeDatabase:RefreshPrototypes() UnityEngineInternal.TreeDatabase:.ctor(TerrainData) UnityEngine.Terrain:OnEnable() There was a terrain object in the data package, but it seemed fine, it had its textures, it's data, I didn't see anything "missing" from its properties. I even dragged the terrain it imported onto the scene and deleted the old one just to see, but I still seem to get this report. It's not having any harmful side effects to the project but it is driving me crazy and wish I knew how to fix it - any ideas? Thanks in advance.