copy Last update: 16.07.2026 MaterialData.copy(source, on_duplicate_name='keep_both') Copy a list of material data source. Keeps track of all dependencies. Parameters source: A list of source of copy. on_duplicate_name: Action to take if source.name is already contained in self.fabrics. keep_both: Create a new instance with the same name (different ID). overwrite: Replace first instance with equal name in self with source. keep_existing: Ignore copy action, returns first existing instance in self with equal name.