Base class for the implementation of core resource importers. This is the base class for the resource importers implemented in core. To implement your own resource importers using editor plugins, see [EditorImportPlugin]. https://docs.godotengine.org/en/3.3/tutorials/plugins/editor/import_plugins.html The default import order. The import order for scenes, which ensures scenes are imported [i]after[/i] all other core resources such as textures. Custom importers should generally have an import order lower than [code]100[/code] to avoid issues when importing scenes that rely on custom resources.