Modify Assets/Scenes/Main Scene.unity: adjust multiple GameObject transforms and prefab instance localPositions (several large position shifts), rename/add objects (TeleporterE1, HallT_Label3 -> TeleporterE1, BulletInsert), add new prefab instance modifications, update mesh/material references and ray-tracing mode, remove many temporary/unused Cube entries to clean up the scene, and activate a character (Nolan). Update .idea workspace.xml: add changelist entry referencing the scene, add a short workItem entry timestamp, and remove a Unity reference flag. Overall: scene layout and prefab cleanup, plus small IDE metadata updates.