A placement whose model load failed (a file missing from the chain, or a model the parser rejects) stayed unspawned for ever. The spawner treats `m2s.get(h) == None` as "still loading", the progress count holds it as pending, and `scene_ready` needs zero pending, so the loading screen never cleared.
`spawn_loaded_placements` now first retires any unspawned placement (M2 or WMO root) or WMO prop whose handle's `LoadState` is `Failed`. A retired entry spawns nothing, is flagged spawned, and leaves `pending_spawns`, with one warning naming the path. That is the same fallback the WDT load already takes. Handles that are still loading keep waiting. WMO groups read inline in the WMO loader, so the root's state covers them.
`a_failed_model_load_retires_the_placement` and `a_failed_prop_load_retires_the_prop` load unresolvable paths through a real `AssetServer`. Both fail with the failure check removed. Built and gated on macOS. What draws in place of a missing model stays #330.
Fixes#616🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
