TWO root causes for "character disappears when walking far":
1. MarkPersistent stored SERVER GUID but RemoveLandblock checked LOCAL
entity.Id — different namespaces, never matched. Fixed by adding
WorldEntity.ServerGuid field and checking it in RemoveLandblock.
2. Even with rescue working, the player entity stays in its SPAWN
landblock's entity list forever. When the player walks to a new
landblock and the spawn landblock gets frustum-culled, the entity
disappears because neverCullLandblockId is computed from the
player's current position (new landblock) but the entity is stored
in the old landblock.
Fixed by calling GpuWorldState.RelocateEntity every frame in the
player-mode update loop. This moves the entity from whatever
landblock it's currently in to the one matching its actual position.
The scan is O(entities) but only runs for one entity per frame.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>