diff --git a/flow-state/DESIGN.md b/flow-state/DESIGN.md
index 8f463fa..619b629 100644
--- a/flow-state/DESIGN.md
+++ b/flow-state/DESIGN.md
@@ -127,6 +127,11 @@ Actors and objects change only at camera cuts:
 - Model layers share one `Compositor` perspective/depth rig; shader depth
   stays faked. Venue rooms are furnished with the track's monolith body
   so the room reads as this track's place.
+- With a room present the viz plays ON its screens (window/wall/radio),
+  never composited over it; model viz additionally stand in the shared
+  world for shared-rig rooms. A `directCamera` room (ride) owns only its
+  own rig — the shared rig keeps the subject grammar, or the viz is filmed
+  through a room camera meant for another world and vanishes.
 
 ## 8. 3D on the same terms
 
diff --git a/flow-state/src/Show.js b/flow-state/src/Show.js
index dfb204e..b453a40 100644
--- a/flow-state/src/Show.js
+++ b/flow-state/src/Show.js
@@ -245,14 +245,23 @@ export class Show {
             // relocates only on story jumps and otherwise holds, while the viz
             // framing cuts at every shot. Feeding the viz framing to the room
             // is what threw it around at every section. See _venueFramingAt.
-            const framing = hasVenue && this.look.venue
+            // A venue that drives its own rig (directCamera) owns only its own
+            // camera: the shared rig keeps filming the viz subjects with the
+            // subject grammar and the viz's own framing. Sending a directCamera
+            // room down the venue path films the viz through a room camera
+            // grammar meant for another world — the subject vanishes. See
+            // Compositor._updateVenueCamera.
+            const venueForCamera = hasVenue && this.look.venue &&
+                !(this.look.venue.module && this.look.venue.module.directCamera)
+                ? this.look.venue : null;
+            const framing = venueForCamera
                 ? this.arc.venueFramingForFrame(timeline.frame)
                 : this.arc.framingForFrame(timeline.frame);
             this.engine.compositor.updateSharedCamera({
                 framing,
                 personality: pers,
                 time: timeline.time,
-                venue: hasVenue && this.look.venue ? this.look.venue : null,
+                venue: venueForCamera,
                 journey: this.arc.state ? this.arc.state.journey : 0,
                 // Continuous 0→1 across the video. The story journey travels in
                 // held stages (right for narrative, wrong for a camera dolly —
diff --git a/flow-state/src/debug/battery.js b/flow-state/src/debug/battery.js
index e97e4f6..e854d4b 100644
--- a/flow-state/src/debug/battery.js
+++ b/flow-state/src/debug/battery.js
@@ -109,11 +109,10 @@ export const SCENARIOS = [
     },
     {
         title: 'venue × viz pins',
-        desc: 'One room, chosen viz behind it. The fastest way to review a venue change.',
+        desc: 'One room, chosen viz in it: fragment viz play on the room\u2019s screen, model viz stand in the shared world. Combos picked so the viz actually reads — a dark or sparse viz on a small screen is invisible, which is how a dead pin hides. (Ride is excluded: its viz lives on the dash radio, too small to review here.)',
         links: [
-            ['Ride + corridor', `/venue-gallery.html${q({ venueSel: 'Ride', viz: 'Synthwave Corridor', rows: 2, cols: 3 })}`],
-            ['Chamber + swarm', `/venue-gallery.html${q({ venueSel: 'Chamber', viz: 'Swarm', rows: 2, cols: 3 })}`],
-            ['Stage + pylons', `/venue-gallery.html${q({ venueSel: 'Stage', viz: 'Pylon Field 3D', rows: 2, cols: 3 })}`],
+            ['Chamber + Kaleido', `/venue-gallery.html${q({ venueSel: 'Chamber', viz: 'Kaleido Tunnel', rows: 2, cols: 3 })}`],
+            ['Stage + Assembly', `/venue-gallery.html${q({ venueSel: 'Stage', viz: 'Assembly', rows: 2, cols: 3 })}`],
         ],
     },
     {