?Does anyone know if there is a way to make a filter by folder when calling EditorGUIUtility.ShowObjectPicker?
I don’t think the string based search filter allows for folders to be passed as parameters. It is one of the reasons why AssetDatabase.FindAssets method has a special parameter of type string array to pass in folders in which to search. The SearchFilter class in unity does have a public string[] folders property which allows you to set the folders to search in with this SearchFilter instance. This property is set by the AssetDatabase.FindAssets method in its implementation. But the ObjectSelector class which is used by the EditorGUIUtility.ShowObjectPicker only supports the string based search filters at the moment.