- New occlusion opt-in on SoundEffect: spatialized instances get a SteamAudioSource with raycast occlusion + frequency-dependent transmission (walls muffle instead of hard-mute) - Replace SoundEffectDistanceRange asset indirection with an explicit _3d bool (user refactor); rolloff/distance now left to defaults - Hey.asset: occlusion enabled Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>