@@ -143,13 +143,13 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`hand-pump`](showcase/hand-pump/) — procedural cast-iron village hand pump through the same pipeline. Falsifier `--skip-decimate` exits 9.
 
-[`signpost`](showcase/signpost/) — procedural timber fingerboard signpost through the same pipeline. Falsifier `--skip-decimate` exits 9.
+[`signpost`](showcase/signpost/) — procedural timber fingerboard signpost through the same pipeline. Falsifiers `--skip-decimate` (9), `--stray-vert` (15), `--yaw-boards` (19).
 
 [`chopping-block`](showcase/chopping-block/) — procedural hooped timber stump with an embedded axe through the same pipeline. Falsifier `--skip-decimate` exits 9.
 
 [`wooden-bucket`](showcase/wooden-bucket/) — procedural coopered pail with a round bail through the ear rings through the same pipeline. Falsifier `--float-handle` exits 17.
 
-[`wall-torch`](showcase/wall-torch/) — procedural wall-mounted torch sconce with a stone plaque, iron bracket, and flame through the same pipeline. Falsifier `--skip-decimate` exits 9.
+[`wall-torch`](showcase/wall-torch/) — procedural wall-mounted torch sconce with a stone plaque, iron bracket, and flame through the same pipeline. Falsifiers `--skip-decimate` (9), `--stray-vert` (15), `--float-arm` (17).
 
 [`tavern-stool`](showcase/tavern-stool/) — procedural tavern stool with turned legs, stretchers, and iron ferrules through the same pipeline. Falsifier `--skip-decimate` exits 9.
 
 
@@ -1090,7 +1090,7 @@ <h2><a href="hand-pump/">hand-pump</a></h2>
         <div class="card-body">
           <h2><a href="signpost/">signpost</a></h2>
           <p class="teaches">A procedural timber fingerboard signpost through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract.</p>
-          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 504 tris, three materials with 66 metal and 24 board faces, UVs in 0..1 with zero AABB overlap, outer AABB 1.368×0.201×1.566 m, LOD ratios in band (5.2 COLLAPSE more aggressive on LOD2), convex collider 56 tris, non-empty glTF. --skip-decimate exits 9 on the LOD1 ratio budget.</p>
+          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 376 tris, three materials with 108 metal, 22 board and 60 wood faces, UVs in 0..1 with zero AABB overlap, outer AABB 1.260×0.142×1.551 m at zmin 0, LOD ratios in band (5.2 COLLAPSE leaner on LOD1/LOD2), convex collider 52 tris, non-empty glTF. Hygiene all zero. Board-to-post gap 5 mm, strap gap 3 mm, board AABB Y 28 mm. --skip-decimate exits 9; --stray-vert 15; --lift-z / --short-shoe 16; --gap-board 17; --float-strap 18; --yaw-boards 19.</p>
           <a class="card-link" href="signpost/">View example <span aria-hidden="true">&rarr;</span></a>
         </div>
       </article>
@@ -1123,7 +1123,7 @@ <h2><a href="wooden-bucket/">wooden-bucket</a></h2>
         <div class="card-body">
           <h2><a href="wall-torch/">wall-torch</a></h2>
           <p class="teaches">A procedural wall-mounted torch sconce with a dressed stone plaque, iron bracket, wooden haft, and emissive flame through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract.</p>
-          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 848 tris, four materials with 162 stone, 134 metal, and 44 flame faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.384×0.360×0.670 m, LOD ratios in band (5.2 COLLAPSE 8 tris leaner on LOD2), convex collider 92 tris, non-empty glTF. --skip-decimate exits 9 on the LOD1 ratio budget.</p>
+          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 1528 tris, four materials with 540 stone, 228 metal and 78 flame faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.304×0.293×0.424 m at zmin 0, LOD ratios in band, convex collider 60 tris, non-empty glTF. Hygiene all zero. Arm-to-cup gap 0.87 mm, plate-to-plaque gap 4 mm, plaque width 0.280 m. --skip-decimate exits 9; --stray-vert 15; --lift-z 16; --float-arm 17; --float-plate 18; --skinny-plaque 19.</p>
           <a class="card-link" href="wall-torch/">View example <span aria-hidden="true">&rarr;</span></a>
         </div>
       </article>
 
@@ -101,6 +101,16 @@ entry in `showcase/gallery.json`, and a rendered still.
   scatter is stones, not open crates; a per-shell face floor is the
   budget that catches a cube leftover (exit 19). `--poke-rock` skips
   the clamp and over-bites; `--float-rocks` seats above the host.
+- **Orthogonal members (exit 19).** Boards, planks or arms that should
+  sit on a world axis assert their AABB secondary extent stays within a
+  named bound of the member thickness. A closed-form yaw of 0.12 rad
+  reads as an accident, not weathering. `--yaw-boards` is the
+  falsifier. Fingerboard tips are a wedge whose base is the board's own
+  thickness×height, bitten into the board so the base face is inside
+  it — not a 45° cube of a different size glued on the end.
+- **Wall-mount zmin (exit 16).** A wall sconce plants the plaque bottom
+  at Z=0. Lifting every vert by a hanging height so the asset floats in
+  its own space is not the same as placing it on a wall in the engine.
 - **Plumb and real-world size (exit 19).** Assert that the axis of a
   turned or lofted body is vertical, by comparing the XY centroid of a
   bottom slab against a top slab — not the exact `zmin` and `zmax`
 
@@ -225,7 +225,7 @@
       "name": "signpost",
       "dir": "showcase/signpost",
       "teaches": "A procedural timber fingerboard signpost through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract.",
-      "witnessesFix": "Recomputed: 504 tris, three materials with 66 metal and 24 board faces, UVs in 0..1 with zero AABB overlap, outer AABB 1.368×0.201×1.566 m, LOD ratios in band (5.2 COLLAPSE more aggressive on LOD2), convex collider 56 tris, non-empty glTF. --skip-decimate exits 9 on the LOD1 ratio budget.",
+      "witnessesFix": "Recomputed: 376 tris, three materials with 108 metal, 22 board and 60 wood faces, UVs in 0..1 with zero AABB overlap, outer AABB 1.260×0.142×1.551 m at zmin 0, LOD ratios in band (5.2 COLLAPSE leaner on LOD1/LOD2), convex collider 52 tris, non-empty glTF. Hygiene all zero. Board-to-post gap 5 mm, strap gap 3 mm, board AABB Y 28 mm. --skip-decimate exits 9; --stray-vert 15; --lift-z / --short-shoe 16; --gap-board 17; --float-strap 18; --yaw-boards 19.",
       "hero": "docs/gallery/assets/signpost-hero.webp",
       "preview": "showcase/signpost/preview.webp",
       "tags": [
@@ -261,7 +261,7 @@
       "name": "wall-torch",
       "dir": "showcase/wall-torch",
       "teaches": "A procedural wall-mounted torch sconce with a dressed stone plaque, iron bracket, wooden haft, and emissive flame through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract.",
-      "witnessesFix": "Recomputed: 848 tris, four materials with 162 stone, 134 metal, and 44 flame faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.384×0.360×0.670 m, LOD ratios in band (5.2 COLLAPSE 8 tris leaner on LOD2), convex collider 92 tris, non-empty glTF. --skip-decimate exits 9 on the LOD1 ratio budget.",
+      "witnessesFix": "Recomputed: 1528 tris, four materials with 540 stone, 228 metal and 78 flame faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.304×0.293×0.424 m at zmin 0, LOD ratios in band, convex collider 60 tris, non-empty glTF. Hygiene all zero. Arm-to-cup gap 0.87 mm, plate-to-plaque gap 4 mm, plaque width 0.280 m. --skip-decimate exits 9; --stray-vert 15; --lift-z 16; --float-arm 17; --float-plate 18; --skinny-plaque 19.",
       "hero": "docs/gallery/assets/wall-torch-hero.webp",
       "preview": "showcase/wall-torch/preview.webp",
       "tags": [