- Fix heavy plate helmet and diving mask screen overlays disappearing when downed or dead - Fix heavy plate helmet audio muffling being cancelled by the wounded mixer snapshot. Muffling now has its own lowpass stage on the In Game and Player Voices groups, so it can mix with other snapshots instead of competing for the one snapshot slot - Helmet muffling is inactive for snapshots like CCTV and Underwater as that felt correct - Remove UIPrisonerHoodOverlay, it's overriden behaviour is what the base class UIBlackoutOverlay does by default now