Cameron's screenshot showed the Heard tint filling space outside the room. Device::cover_into painted the raw Euclidean disc while heard events were room-grained via feed_covering_room; the 5a16ad8 occlusion fix only covered sight. cover_into now paints whole rooms the disc reaches — the identical room set the event path uses, so the tint and event coverage cannot disagree — plus a wall-bounded flood for open space outside rooms. Regression test asserts no heard tile is solid space outside a room even at radius 100. cursor.md hearing bullet records the spatial rule. Defense: cursor.md already legislates 'Hearing yields room-grade events' and 'Justification and legibility' forbids the interface suggesting senses the player does not have. Painting sound through concrete was the render lying about coverage; this makes the paint exactly the event truth.