# Prefab fixtures The `example_base` -> `example_nested` -> `example_variant` chain is the production-format fixture for linked prefab ownership, nested stable actor paths, and variant override layering. The variant hides `base-mesh` through an `EditorVisibility` component override targeted as `nested-link / base-link / base-mesh` when the variant is placed in a scene. Keep these files loadable by the editor and valid under `cargo validate-levels`. Broken-source, cycle, and conflict fixtures belong in temporary test projects so the shipped asset tree remains healthy.