Sitting Furniture Hotspots, Beam Light Show/Hide, Permanent Echo Stream & Per-Path LCMV Blocker

Scene 118 — FurnitureHotspotTriggerEngine (<1 ms pre-computed focal phase LUT for Sofa, Chair, Bed & Desk), Target-Indicated Beam Light Show/Hide (420 lx cyan vs 0 lx stealth), Permanent Echo Light Stream (100% CW pilot lock), and Per-Path Override Blocker (-48 dB LCMV phase null). Complete physics, Hardware BOM & TODO checklist.

Scene 118 of 123 in the StopBeingParanoid interactive 3D research collection. Requires JavaScript and WebGL2 for the interactive visualisation.

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