Docs: session log Part M + roadmap tick — Phase 1.5b ground bundle shipped

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Docs/Vault/06_Roadmap/Iteration_2026-07_CoopHades.md

@@ -161,12 +161,13 @@ attacks/animations/effects**. Art direction deliberately UNDECIDED — lighting
 Post-1.5 operator verdict: barrels fixed (radius disc + 1.5 s fuse, `eb7f57216`) but **"the ground is very
 plain"** — expand 1.5 before 1.7. Locked bundles, sequenced ground-first:
 
-1. **Ground bundle** (the stated pain): (a) ground MATERIAL pass — macro-noise blended albedo (generated
-   textures + Synty terrain textures), per-BIOME ground tint driven client-side (the WorldAtmosphere
-   sibling), rim-darkening vignette overlay; (b) **per-room dressing scatter** — client-only, seeded off the
-   replicated run seed, cosmetic `SM_Env_Ground_*` detail meshes (ripples/cracks/pebbles/bones), torn down
-   with the room; (c) base worn paths (spawn→warpgate→storage); (d) re-enable curated base flora (~300
-   inactive props; they inherit sway/rustle).
+1. ✅ **Ground bundle** (SHIPPED `2fc5ae9a1`): (a) material pass — real tiling (22×/26×) + Synty normals +
+   generated LINEAR macro-noise detail textures w/ baked rim vignette (★ an sRGB-imported detail map mul2x
+   DARKENS 2.3× — import detail albedo LINEAR); per-room-biome ground tint via MPB inside
+   `WorldAtmosphereSystem`; (b) `RoomDressingSystem`+`RoomDressingConfig` — 26 seeded biome-flavoured props
+   per room inside the room's ACTUAL shape (hash stream 0xD2E55; 47 build-safe prefab refs), room-torn-down;
+   live-verified incl. teardown + exact Meadow tint convergence; (c) worn paths storage→warpgate/base-gate;
+   (d) 357 base flora re-enabled (buildings/pond/FX stay parked).
 2. **Decals**: dynamic explosion scorch marks (fading quad pool at boom sites), static POI scorch/cracks,
    cover damage-crack states (URPMaterialPropertyBaseColor darkening keyed on replicated Remaining).
 3. **Hazard variant**: Blight geyser (periodic both-sides AoE on the HazardExplosion + telegraph-disc

Docs/Vault/07_Sessions/2026/2026-07-09_B4d_Tail_Collision_Grounding.md

@@ -256,14 +256,47 @@ held to the boom at 1.54 s, scale exactly 3.25; 470/470. Ground/expansion menu p
 per-room dressing scatter · paths · decals · flora re-enable · hazard variants · critters · cover cracks);
 awaiting operator picks.
 
+## Part M — Phase 1.5b GROUND BUNDLE shipped (`2fc5ae9a1`)
+
+Operator locked ALL FOUR 1.5b bundles (ground / decals / geyser / critters+weather), ground first. Shipped
+the ground bundle end-to-end:
+
+- **Material pass.** Ground-truth probe: the playable ground was two flat quads with ONE texture repeat per
+  45 u (meadow 2×2 over 90 u) — the whole "plain" complaint in one number. Rebuilt: base maps at real tiling
+  (grass 22×, sand 26×) + Synty normal maps + a generated 1024² macro-noise DETAIL texture per biome tiled 1×
+  (0.5-centered fbm + warm/cool hue patches + baked rim vignette). ★ Gotcha worth keeping: an sRGB-imported
+  detail albedo goes through the shader's sRGB→linear conversion, so mid-gray reads 0.214 and MULX2 darkens
+  everything 2.3× — import detail maps LINEAR (0.5 stored = neutral). Also moved the meadow ground OFF the
+  shared Synty asset (`Mat_Grass_Textures_01` was being edited in place — bleed hazard) onto project-owned
+  `Mat_Ground_Meadow`, and measured tints to an on-screen luminance target (0.15/0.20) instead of guessing —
+  the old effective albedo was ~4–6× darker than every prop standing on it.
+- **Per-room-biome ground tint** folded into `WorldAtmosphereSystem` (same palette switch that owns fog/
+  ambient): expedition quads tinted via MaterialPropertyBlock — Meadow green / Cavern blue / Blight purple /
+  Arid sand — damped lerp, asset never touched.
+- **`RoomDressingSystem` + `RoomDressingConfig`** (new, client-only observe-only): 26 biome-flavoured cosmetic
+  props per room scattered inside the room's ACTUAL shape — the client re-derives the plan via
+  `RunMap.NodeId(CurrentRoom, CurrentCol)` → `RoomLayoutMath.Plan` → `ScatterInShape` on a DISTINCT hash
+  stream (0xD2E55; nodes 0x0DE, clutter 0xC17) so dressing never co-locates with gameplay scatter.
+  Deterministic from the replicated seed (co-op + late-join consistent); landing/portal keep-outs; colliders
+  stripped on spawn; torn down on room change/run end. 47 curated URP-native prefab refs (PNB + PolygonNature
+  + FK) wired as serialized scene refs (build-safe — no Resources.Load).
+- **Base dressing:** 357 curated flora props re-enabled under BaseBiome (bushes/wildflowers/grass — buildings,
+  pond + FX props deliberately stay parked; `GlobalPostFX` left untouched) + two generated worn-dirt path
+  strips (feathered-alpha transparent quads) storage→warpgate and storage→base-gate.
+
+Live-verified in Play: dressing 26/26 inside x[981,1023] z[−11,12] all y=0, 11 varieties, 0 colliders;
+teardown proven (run abort → 0 children); Meadow ground tint converged to the EXACT target (0.47,0.55,0.43);
+470/470 EditMode; console clean. Edit-mode renders: base reads as a living meadow with a worn path to the
+warpgate.
+
 ## Next-session intent
 
-**Phase 1.5 is COMPLETE** (collision · lighting · art-look LOCKED clean dark-Synty · ambient motion ·
-breakables · attack distinctness · exploding barrels · destructible cover). Next per the locked order:
-**the operator's 1.5 gate lap** ("no longer static"?) → **Phase 1.7 boon overhaul** (~12 mechanic-changers
-on existing hooks; design-review-FIRST — replicated ability swaps) → Phase 2 hub-ification. Taste queue:
-re-enable curated base flora (barren hub) · arid brightness · craters call · B5 split-panels smoke · barrel
-explosion VFX polish · cover damage-crack visuals.
+**Phase 1.5b bundle 1 (ground) is SHIPPED**; remaining locked bundles in order: **2) decals** (explosion
+scorch pool · POI grime · cover damage-cracks) → **3) Blight geyser** (mini design review first — new
+replicated erupt-phase surface) → **4) critters + weather beats**. Then the operator's 1.5 gate lap ("no
+longer static", ground judged explicitly) → Phase 1.7 boon overhaul (design-review-FIRST) → Phase 2
+hub-ification. Taste queue: arid brightness · craters call · B5 split-panels smoke · barrel explosion VFX
+polish · flower density judgment (base may read dense — operator call on the lap).
 
 Related: [[Iteration_2026-07_CoopHades]] · [[2026-07-07_Workflow_Consolidation]] ·
 [[2026-07-07_Expedition_Enemy_Stuck_Harvest_Feedback]]