@@ -409,7 +409,7 @@ <h2><a href="driver-wave/">driver-wave</a></h2>
       </article>
       <article class="card" data-tags="mesh bmesh">
         <a class="card-media" href="bmesh-gear/" tabindex="-1" aria-hidden="true">
-          <img src="assets/bmesh-gear-hero.webp" alt="A gold fourteen-tooth gear lying at an angle, its face covered in concentric grooves." loading="lazy" decoding="async" />
+          <img src="assets/bmesh-gear-hero.webp" alt="A gold fourteen-tooth gear leaning back on a dark display wedge, its face covered in concentric grooves." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="bmesh-gear/">bmesh-gear</a></h2>
@@ -651,7 +651,7 @@ <h2><a href="vertex-weight-limit/">vertex-weight-limit</a></h2>
       </article>
       <article class="card" data-tags="mesh uv">
         <a class="card-media" href="triangulate-tangents/" tabindex="-1" aria-hidden="true">
-          <img src="assets/triangulate-tangents-hero.webp" alt="A round silver buckler on a stand, its face brushed in circular grooves with an anisotropic highlight." loading="lazy" decoding="async" />
+          <img src="assets/triangulate-tangents-hero.webp" alt="A round silver buckler leaning back on a low stand, its face brushed in circular grooves with an anisotropic highlight." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="triangulate-tangents/">triangulate-tangents</a></h2>
@@ -728,11 +728,11 @@ <h2><a href="sky-texture-sun-elevation/">sky-texture-sun-elevation</a></h2>
       </article>
       <article class="card" data-tags="grease-pencil line-art modifiers">
         <a class="card-media" href="gp-lineart-contour/" tabindex="-1" aria-hidden="true">
-          <img src="assets/gp-lineart-contour-hero.webp" alt="A translucent hourglass-shaped solid outlined by cyan Line Art contour strokes." loading="lazy" decoding="async" />
+          <img src="assets/gp-lineart-contour-hero.webp" alt="A translucent teal crystal, a six-sided double pyramid set tip-down in a dark hex mount, its edges traced by cyan Line Art contour strokes." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="gp-lineart-contour/">gp-lineart-contour</a></h2>
-          <p class="teaches">Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 10 strokes / 34 points on both 4.5.11 and 5.1.2. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius.</p>
+          <p class="teaches">Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 2 strokes / 12 points on 4.5.11, 5.1.2 and 5.2.1. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius.</p>
           <p class="witnesses"><span class="tag">witnesses</span> AI code still sets LINEART.thickness on 5.1 (AttributeError) or hand-draws strokes / enables Freestyle instead of modifiers.new(..., &#x27;LINEART&#x27;). Clearing source_object or leaving contour+crease off silently yields an empty drawing — the check proves both failure modes and recovery.</p>
           <a class="card-link" href="gp-lineart-contour/">View example<span class="sr-only"> gp-lineart-contour</span> <span aria-hidden="true">&rarr;</span></a>
         </div>
 
@@ -86,7 +86,7 @@
       "name": "bmesh-gear",
       "dir": "examples/bmesh-gear",
       "teaches": "A 14-tooth gear built entirely with bmesh — profile ring, face, extrude — with bm.free() in a try/finally, exactly as the ownership contract demands.",
-      "alt": "A gold fourteen-tooth gear lying at an angle, its face covered in concentric grooves.",
+      "alt": "A gold fourteen-tooth gear leaning back on a dark display wedge, its face covered in concentric grooves.",
       "witnessesFix": "Parametric bmesh topology is exactly predictable: verts, edges, and faces match their closed forms, and every edge borders exactly two faces (watertight).",
       "hero": "docs/gallery/assets/bmesh-gear-hero.webp",
       "preview": "examples/bmesh-gear/preview.webp",
@@ -380,7 +380,7 @@
       "name": "triangulate-tangents",
       "dir": "examples/triangulate-tangents",
       "teaches": "A machined buckler verifying the tangent-space contract a game engine's normal mapping depends on. Deterministic triangulation, unit orthogonal tangent frames, and the edge/UV-delta formula matching mikktspace within welding tolerance.",
-      "alt": "A round silver buckler on a stand, its face brushed in circular grooves with an anisotropic highlight.",
+      "alt": "A round silver buckler leaning back on a low stand, its face brushed in circular grooves with an anisotropic highlight.",
       "witnessesFix": "calc_tangents aborts on any ngon; planar UVs on a cylindrical wall collapse tangents onto normals; a MeshUVLoopLayer handle held across calc_tangents dangles on 4.5 (471 phantom flips, silent exit 0) while the mikktspace math is byte-identical on both versions.",
       "hero": "docs/gallery/assets/triangulate-tangents-hero.webp",
       "preview": "examples/triangulate-tangents/preview.webp",
@@ -473,8 +473,8 @@
     {
       "name": "gp-lineart-contour",
       "dir": "examples/gp-lineart-contour",
-      "teaches": "Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 10 strokes / 34 points on both 4.5.11 and 5.1.2. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius.",
-      "alt": "A translucent hourglass-shaped solid outlined by cyan Line Art contour strokes.",
+      "teaches": "Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 2 strokes / 12 points on 4.5.11, 5.1.2 and 5.2.1. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius.",
+      "alt": "A translucent teal crystal, a six-sided double pyramid set tip-down in a dark hex mount, its edges traced by cyan Line Art contour strokes.",
       "witnessesFix": "AI code still sets LINEART.thickness on 5.1 (AttributeError) or hand-draws strokes / enables Freestyle instead of modifiers.new(..., 'LINEART'). Clearing source_object or leaving contour+crease off silently yields an empty drawing — the check proves both failure modes and recovery.",
       "hero": "docs/gallery/assets/gp-lineart-contour-hero.webp",
       "preview": "examples/gp-lineart-contour/preview.webp",
 
@@ -14,8 +14,9 @@ often gets wrong.
   strokes (proven in the same check pass). Restoring it recovers the contour.
 - **Edge-type flags matter.** A freshly added LINEART with `use_contour` and
   `use_crease` both off emits **0** strokes; turning contour (+ crease) back on
-  recovers the silhouette (**10** strokes / **34** points on both binaries for
-  this crystal + camera).
+  recovers the silhouette (**2** strokes / **12** points on every binary for
+  this crystal + camera; Line Art chains the bipyramid's edges into long
+  strokes, so the count is low and the gates are lower bounds).
 - **Stroke width renamed.** 4.5 exposes both `thickness` (legacy px, set to 45
   here) and `radius`; 5.1 removes `thickness` (`AttributeError`) and keeps
   `radius` only (portable path: `mod.radius = 0.028`).
@@ -27,8 +28,15 @@ often gets wrong.
 `source_object` assignment (exit 4), contour too thin (exit 5), source clear
 not zeroing strokes (exit 6), flags-off or restore failure (exit 7).
 
-**Version witness:** stroke counts match on 4.5.11 LTS and 5.1.2
-(10 strokes / 34 points). The divergence is `thickness` vs `radius`.
+**Version witness:** stroke counts match on 4.5.11 LTS, 5.1.2 and 5.2.1 LTS
+(2 strokes / 12 points). The divergence is `thickness` vs `radius`.
+
+**The still:** the crystal is a hexagonal bipyramid (an equator ring and two
+apexes), set tip-down in a two-tier hex mount on the floor. The mount is
+render staging, derived from the crystal's lowest evaluated vertex; it is built
+after the check, so it never enters the Line Art counts. The still's camera
+drops its aim and dollies in along the check camera's bearing, so the crystal
+fills the frame with the mount's foot inside it.
 
 ## Run
 
 
@@ -38,10 +38,19 @@
 
 # Faceted crystal (octahedron-ish) — enough silhouette edges to read at thumbnail
 CRYSTAL_SCALE = 1.15
+CRYSTAL_R = 0.72        # bipyramid equator radius (before CRYSTAL_SCALE)
+CRYSTAL_APEX = 0.88     # apex height above/below the equator
 STROKE_MIN = 1
 POINT_MIN = 4
 RADIUS = 0.028
 
+# render staging only (not part of the check)
+MOUNT_R = 0.46          # hex plinth base radius
+MOUNT_BASE_H = 0.07     # base tier height, standing on the floor
+MOUNT_SOCKET = 0.10     # depth the crystal's lower tip sinks into the mount
+STILL_AIM_Z = 1.05      # still camera aim height (the check's is 1.15)
+STILL_DOLLY = 0.94     # still camera distance, relative to the check's
+
 
 def eevee_engine_id():
     return "BLENDER_EEVEE" if bpy.app.version >= (5, 0, 0) else "BLENDER_EEVEE_NEXT"
@@ -82,19 +91,16 @@ def build_crystal(sc):
     me = bpy.data.meshes.new("Crystal")
     bm = bmesh.new()
     try:
-        # Dual cone = octahedron-like crystal
-        bmesh.ops.create_cone(
-            bm, cap_ends=False, cap_tris=True,
-            segments=6, radius1=0.85, radius2=0.0, depth=1.4,
-        )
-        # second tip downward
-        geom = bmesh.ops.duplicate(bm, geom=list(bm.verts) + list(bm.edges) + list(bm.faces))
-        verts = [e for e in geom["geom"] if isinstance(e, bmesh.types.BMVert)]
-        bmesh.ops.rotate(
-            bm, verts=verts, cent=(0, 0, 0),
-            matrix=Matrix.Rotation(math.pi, 3, "X"),
-        )
-        bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=1e-4)
+        # Hexagonal bipyramid: one equator ring, an apex above and below.
+        # (Two overlapped open cones, the earlier build, crossed into an
+        # hourglass with open ends and an inner spike.)
+        ring = [bm.verts.new((CRYSTAL_R * math.cos(math.pi * k / 3),
+                              CRYSTAL_R * math.sin(math.pi * k / 3), 0.0))
+                for k in range(6)]
+        for apex_z in (CRYSTAL_APEX, -CRYSTAL_APEX):
+            apex = bm.verts.new((0.0, 0.0, apex_z))
+            for k in range(6):
+                bm.faces.new((ring[k], ring[(k + 1) % 6], apex))
         bmesh.ops.recalc_face_normals(bm, faces=bm.faces)
         bmesh.ops.scale(bm, vec=(CRYSTAL_SCALE,) * 3, verts=bm.verts)
         bm.to_mesh(me)
@@ -362,7 +368,54 @@ def light(name, loc, energy, size, col, rot):
     light("Wedge", (2.5, 5.5, 4.0), 280.0, 6.0, (1.0, 0.76, 0.5), (-68, 0, 190))
 
 
+def build_mount(sc, crystal):
+    """Render staging only: a two-tier hex plinth seated on the floor whose
+    top swallows the crystal's lower tip, so the crystal is set in a mount
+    instead of hovering. Derived from the evaluated crystal; the crystal
+    itself (and so every Line Art count above) is untouched."""
+    bpy.context.view_layer.update()
+    mw = crystal.matrix_world
+    tip = min((mw @ v.co for v in crystal.data.vertices), key=lambda p: p.z)
+    top = tip.z + MOUNT_SOCKET
+    me = bpy.data.meshes.new("Mount")
+    bm = bmesh.new()
+    try:
+        for r, z0, z1 in ((MOUNT_R, -0.003, MOUNT_BASE_H),
+                          (MOUNT_R * 0.72, MOUNT_BASE_H - 0.003, top)):
+            bmesh.ops.create_cone(
+                bm, cap_ends=True, segments=6, radius1=r, radius2=r,
+                depth=z1 - z0,
+                matrix=Matrix.Translation((tip.x, tip.y, (z0 + z1) / 2))
+                @ Matrix.Rotation(crystal.rotation_euler.z, 4, "Z"),
+            )
+        bm.to_mesh(me)
+    finally:
+        bm.free()
+    for p in me.polygons:
+        p.use_smooth = False
+    mat = bpy.data.materials.new("MountStone")
+    mat.use_nodes = True
+    b = mat.node_tree.nodes["Principled BSDF"]
+    b.inputs["Base Color"].default_value = (0.06, 0.062, 0.07, 1.0)
+    b.inputs["Roughness"].default_value = 0.55
+    me.materials.append(mat)
+    ob = bpy.data.objects.new("Mount", me)
+    sc.collection.objects.link(ob)
+    return ob
+
+
 def render_still(sc, path, engine):
+    source = sc.objects["Crystal"]
+    mount = build_mount(sc, source)
+    # reframe for the still only (the check ran from the setup_camera view):
+    # lower the aim so the mount's foot clears the bottom edge, and dolly in
+    # along the same bearing so the crystal still fills the frame
+    aim = sc.objects["Aim"]
+    cam = sc.camera
+    bearing = cam.location - aim.location
+    aim.location.z = STILL_AIM_Z
+    cam.location = aim.location + bearing * STILL_DOLLY
+    bpy.context.view_layer.update()
     sc.render.engine = "CYCLES" if engine == "cycles" else eevee_engine_id()
     if engine == "cycles":
         sc.cycles.device = "CPU"
@@ -380,16 +433,17 @@ def render_still(sc, path, engine):
     sc.view_settings.view_transform = "Standard"
     # Layer 1 framing gate (silhouette matte) — exit 10 on violation, before
     # the beauty render so a defective composition ships no artifact. The two
-    # renderable subjects are the crystal source mesh and the GP stroke object.
+    # hero subjects are the crystal source mesh and the GP stroke object; the
+    # mount is staging, so it must clear the edges but does not count as fill.
     stage = [o for o in sc.objects if o.name in {"Floor", "Wall"}]
     hero = [
         o for o in sc.objects
-        if o.type in {"MESH", "GREASEPENCIL"} and o not in stage
+        if o.type in {"MESH", "GREASEPENCIL"} and o not in stage and o != mount
     ]
     fcode = gallery_framing.check_framing(
         sc, sc.camera,
         hero=hero,
-        elements=hero,
+        elements=hero + [mount],
         stage=stage,
     )
     if fcode: