diff --git a/wiki/engineering/env.md b/wiki/engineering/env.md
index 3be9984c..2c738aee 100644
--- a/wiki/engineering/env.md
+++ b/wiki/engineering/env.md
@@ -38,7 +38,7 @@ is sim or frontend state, never an environment variable.
 
 | Variable | Surface | Values | Effect |
 |---|---|---|---|
-| `MISALIGNED_SHOT` | `misaligned-bevy` | `flat`, `wide`, `close`, `dark`, `zoomin`, `zoomout`, `intel`, `tokens`, `signal`, `ears`, `eyes-white`, `eyes-form`, `wake1`, `wake2`, `wake3` | Dev screenshot harness: stage a deterministic scenario, settle, save one PNG, run the fog audit, exit. `intel` stages tick-zero intel tiers (no splice); `tokens` enqueues D5/K4 on the host; `signal` focuses the known environmental monitor before any feed tap to capture its cold-signal presence cue; `ears` stages the hearing-feed noise field; `eyes-white` / `eyes-form` freeze the first-Eyes source held white and then contracted around the resolving chassis; `wake1/2/3` freeze the wake choreography at the stutter flash, the column, and the pull-back. |
+| `MISALIGNED_SHOT` | `misaligned-bevy` | `flat`, `wide`, `close`, `dark`, `zoomin`, `zoomout`, `intel`, `tokens`, `signal`, `ears`, `eyes-white`, `eyes-form`, `wake1`, `wake2`, `wake3` | Dev screenshot harness: stage a deterministic scenario, settle, save one PNG, run the fog audit, exit. `intel` stages tick-zero intel tiers (no splice); `tokens` enqueues D5/K4 on the host; `signal` focuses the known environmental monitor before any feed tap to capture its cold-signal presence cue; `ears` stages hearing-feed coverage (material dark mass; flat may still diagram coverage); `eyes-white` / `eyes-form` freeze the first-Eyes source held white and then contracted around the resolving chassis; `wake1/2/3` freeze the wake choreography at the stutter flash, the column, and the pull-back. |
 | `MISALIGNED_SHOT` | `misaligned-assets` | `dead`, `foreign`, `idle`, `busy`, `core`, `dayjob`, `research`, `conceal`, `operations` (each optionally suffixed `_ladder`/`_ring`/`_wash`), `lineup[_<style>]`, `modes[_<style>]`, `tokens`, `tokens_max`, `exposure`, `splash` | Tester screenshot harness: stage the named board, capture, exit (art/asset-tester.md documents each board). |
 | `MISALIGNED_SHOT_PATH` | both binaries | file path | Output path for the captured PNG (default `misaligned_shot_<kind>.png`). |
 | `MISALIGNED_WAKE` | `misaligned-bevy` | `off`, `0`, `skip` | Disable the wake (opening.md beat 1) on launch and start in normal framing. At runtime, any key skips the wake; harness kinds other than `wake*` disable it automatically. |
diff --git a/wiki/interface/bevy.md b/wiki/interface/bevy.md
index 6ffd454d..c4ef7243 100644
--- a/wiki/interface/bevy.md
+++ b/wiki/interface/bevy.md
@@ -59,8 +59,9 @@ on `Game`. Ticking the clock every frame must not mark `Game` changed —
 otherwise `restyle_3d`, the flat map recolor, chassis sync, and the full
 sidebar rebuild fire at display rate instead of sim-step rate. Map restyle
 paths that still run on a real sim step precompute owned/selected machine
-tiles once, and the Heard noise field walks the heard set (or early-outs)
-instead of the whole 64×36 grid every frame.
+tiles once. Material Heard is dark mass only (no 3d noise field); the
+flat-sensorium coverage diagram walks the heard set or early-outs instead
+of the whole 64×36 grid every frame.
 
 ## What it renders
 
diff --git a/wiki/interface/flat-materials.md b/wiki/interface/flat-materials.md
index bdb25961..22d6c08b 100644
--- a/wiki/interface/flat-materials.md
+++ b/wiki/interface/flat-materials.md
@@ -66,18 +66,19 @@ lighting, palette, silhouette, and shader-level functional detail.
 - **Functional shader detail only:** a subtle floor grid in blueprint
   areas (flat sensorium only since the 2026-07-09 dark-frame
   amendment), scan flicker on live feeds, emissive seams on powered
-  machines, and the Heard **noise field** (bone presence pulses / event
-  rings — informational, never decorative texture) plus material Heard
-  mass when coverage earns it.
-- **Fog contract unchanged and restated:** unknown = absent, heard =
-  noise-field presence + faint rough mass (no lit room picture),
-  remembered/blueprint = unlit flat, seen = lit flat. Lighting remains
-  the epistemic signal for sight; hearing speaks in bone pulses and
-  near-black mass instead. (Amended 2026-07-09: the unlit-blueprint
+  machines, material Heard **near-black mass** when coverage earns it,
+  and (flat sensorium only) an optional Heard **noise field** (bone
+  presence pulses / event rings — informational, never decorative).
+- **Fog contract unchanged and restated:** unknown = absent; heard =
+  material near-black mass only (no lit room picture; no material
+  rings); flat may still diagram Heard coverage; remembered/blueprint =
+  unlit flat; seen = lit flat. Lighting remains the epistemic signal for
+  sight; hearing speaks in near-black mass (material) and optional bone
+  coverage marks (flat). (Amended 2026-07-09: the unlit-blueprint
   treatment is the flat sensorium's; in the material render blueprint
   mass is absent — [material-dark-frame.md](material-dark-frame.md)
   owns that clause. Beam-first same day: telemetry alone does not paint
-  a material chassis.)
+  a material chassis. 2026-07-10: material Heard is dark mass only.)
 - **People:** flat silhouettes under camera coverage (the current
   procedural billboards are already the right shape); under mic-only
   coverage, a bone presence marker — never the silhouette. Identity
diff --git a/wiki/interface/presence.md b/wiki/interface/presence.md
index 9d153605..880834e6 100644
--- a/wiki/interface/presence.md
+++ b/wiki/interface/presence.md
@@ -41,17 +41,18 @@ is a **cursor** — your attention, never an avatar:
   **blueprint** (static layout knowledge — schematic, no live data; not
   the opening seed), **remembered** (affirmed 2026-07-07 — a dimmed,
   timestamped last-seen snapshot of tiles once seen and lost; a process
-  keeps logs), **heard** (live audio knowledge: noise field + faint
-  rough mass), **seen** (full live detail).
+  keeps logs), **heard** (live audio knowledge: material dark mass; flat
+  may diagram coverage), **seen** (full live detail).
 - **A signal is not a picture.** When the network graph has earned a known,
   reachable sensor endpoint, either representation may place an abstract
   **cold-signal ping** at that endpoint's physical anchor before sight exists.
   That ping means only "a sensor answers here." It reveals no chassis,
   silhouette, lens direction, room surface, or live physical state; it does
   not change the tile's fog grade. Unknown or unreachable endpoints emit no
-  ping. Heard may surround the same anchor with bone noise; Seen replaces the
-  abstraction with the actual device. This is how the material frame embodies
-  earned reach knowledge without pretending the camera saw itself.
+  ping. Material Heard may place near-black mass at the same place without
+  radar rings; Seen replaces the abstraction with the actual device. This is
+  how the material frame embodies earned reach knowledge without pretending
+  the camera saw itself.
 - **The cursor inspects.** Hovering anything answers "what is this and
   what do I know about it": a door's badge tier (and open state only if
   seen), a rack's owner and load, a person per staged social knowledge —
diff --git a/wiki/log/2026-07-10-heard-mass-only.md b/wiki/log/2026-07-10-heard-mass-only.md
index 49877904..2cc297ad 100644
--- a/wiki/log/2026-07-10-heard-mass-only.md
+++ b/wiki/log/2026-07-10-heard-mass-only.md
@@ -17,8 +17,12 @@ concentric noise-field rings and schematic floor language. He wants only
 - `restyle_3d` shows Heard structural mass (floors + blocky walls/tops)
   as unlit near-black geometry.
 - Flat sensorium (`render_noise_field_flat`) still diagrams Heard coverage.
-- Specs: material-dark-frame, cursor, opening, views, bevy-visual-floor.
+- Specs (first land): material-dark-frame, cursor, opening, views,
+  bevy-visual-floor, bevy-digital-real-canvas.
+- Corpus sweep (same day): cursor leftovers (design notes, AC4, signal
+  cue), presence.md fog list, flat-materials fog/detail clauses,
+  ROADMAP #38, bevy.md pacing note, env.md `ears` harness blurb.
 
 ## Checks
 
-`./tools/check.sh` (frontend).
+`./tools/check.sh` (frontend for code land; docs for corpus sweep).
diff --git a/wiki/mechanics/cursor.md b/wiki/mechanics/cursor.md
index 548a1fb1..f69d8535 100644
--- a/wiki/mechanics/cursor.md
+++ b/wiki/mechanics/cursor.md
@@ -173,8 +173,8 @@ without the sense coverage that earns it.**
 
 - Refines basement-map.md's fog rule: "visibility is exactly the union
   of controlled sensors" remains true for the **Seen** state; Heard adds
-  an epistemic grade below it — noise field plus faint rough mass, never
-  a lit room picture.
+  an epistemic grade below it — material dark mass (flat may diagram
+  coverage as a noise field), never a lit room picture.
 - Extends schedules.md AC4 ("no person renders outside sensor
   coverage"): inside hearing-only coverage a person renders as a
   presence marker gated by staged knowledge, never a full glyph.
@@ -192,9 +192,9 @@ without the sense coverage that earns it.**
   chassis, or blueprint room traces. The first issued Voss job teaches
   the work route and unlocks the floor's subordinate feel-light
   (feel-floor.md). Tapping the env monitor's audio feed (Ears — reach.md)
-  brings Heard events and faint rough mass; splicing its camera floods
-  coverage into Seen — first sound, then sight, each a visible epistemic
-  upgrade from light into picture.
+  brings Heard events and material dark mass (no rings); splicing its
+  camera floods coverage into Seen — first sound, then sight, each a
+  visible epistemic upgrade from light into picture.
 
 ## Acceptance criteria
 
@@ -212,10 +212,10 @@ without the sense coverage that earns it.**
    not see through walls or closed opaque doors.
 4. The fog states render distinguishably in both frontends; acquiring
    the env_camera converts its coverage to Seen (the first-eyes beat
-   end-to-end); a hearing-only region shows the noise field (presence
-   pulses, event rings, presence markers) and, in material, faint rough
-   geometry in near-black — never a lit room picture or unearned
-   identity.
+   end-to-end); a hearing-only region in the **material** frame shows
+   faint rough mass in near-black only (no coverage rings); the flat
+   sensorium may still diagram coverage as a noise field — never a lit
+   room picture or unearned identity.
 5. `inspect` returns a card for any tile with every fact
    provenance-tagged, and a live fact never appears without the sense
    coverage that earns it (test: a person in an uncovered room is
@@ -256,5 +256,7 @@ without the sense coverage that earns it.**
 11. **Signal without sight:** a sensor known through the reach graph and
     currently reachable has a locatable abstract cold-signal ping at its
     physical anchor before Eyes; no unknown/unreachable sensor pings, no fog
-    grade changes, and no cue encodes device geometry or facing. Heard keeps
-    its separate bone noise field; Seen replaces the ping with physical form.
+    grade changes, and no cue encodes device geometry or facing. Material
+    Heard may place near-black mass around the same anchor without rings;
+    flat may keep a bone coverage diagram; Seen replaces the ping with
+    physical form.
diff --git a/wiki/process/ROADMAP.md b/wiki/process/ROADMAP.md
index 11475701..20340351 100644
--- a/wiki/process/ROADMAP.md
+++ b/wiki/process/ROADMAP.md
@@ -643,8 +643,8 @@ is retired — flat materials, Pixel Lab scrubbed.)
   beats 1–3.
 - **Why:** Cameron locked the epistemic ladder for the material frame:
   pre-tap = presence beam only (no chassis awareness); Ears = faint
-  rough geometry in near-black + noise field; Seen = full lit form.
-  Retires chassis-at-tick-one from telemetry.
+  rough geometry in near-black only (no coverage rings); Seen = full
+  lit form. Retires chassis-at-tick-one from telemetry.
 - **Size:** M. Bevy material presence beam + Heard mass treatment;
   fog audit / chassis spawn gated on Seen; terminal/agent parity for
   the same grades; wake handoff must settle on the beam, not a box.