fix: cross-version-property-delete presentation, tags hang from the stand

Render path only: the tags hang from the bar on rods instead of floating in
front of it. Contract and exit codes unchanged on 4.5.11, 5.1.2 and 5.2.1.
Also regenerates the gallery index for all four items.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

Author: TMHSDigital

README.md

@@ -744,7 +744,7 @@ sources are gone, and local Z spans all three steps.
 </tr>
 <tr>
 <td width="46%" valign="middle">
-<a href="examples/cross-version-property-delete/"><img src="examples/cross-version-property-delete/preview.webp" alt="Cross-version property delete: two brass specimen tags on a dark studio stand — left tag with a cyan emissive enamel inlay (ID property kept), right tag with an empty grey pocket (ID property deleted)" /></a>
+<a href="examples/cross-version-property-delete/"><img src="examples/cross-version-property-delete/preview.webp" alt="Cross-version property delete: two brass specimen tags hanging on rods from a dark studio stand — left tag with a cyan emissive enamel inlay (ID property kept), right tag with an empty grey pocket (ID property deleted)" /></a>
 </td>
 <td valign="middle">
 

docs/gallery/assets/cross-version-property-delete-hero.webp

@@ -16,13 +16,13 @@
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cross-version-property-delete-hero.webp" />
   <meta property="og:image:width" content="1280" />
   <meta property="og:image:height" content="720" />
-  <meta property="og:image:alt" content="Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one." />
+  <meta property="og:image:alt" content="Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket." />
   <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="cross-version-property-delete — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Custom ID properties are removed with del, not property_unset. The IDs are built through bpy.data.objects.new so the check does not depend on active_object." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cross-version-property-delete-hero.webp" />
-  <meta name="twitter:image:alt" content="Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one." />
+  <meta name="twitter:image:alt" content="Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket." />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
@@ -268,8 +268,8 @@ <h1>cross-version-property-delete</h1>
     <p>Custom ID properties are removed with del, not property_unset. The IDs are built through bpy.data.objects.new so the check does not depend on active_object.</p>
   </header>
   <main id="main">
-    <button class="detail-hero" id="heroZoom" type="button" aria-label="View full size: Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one.">
-      <img src="../assets/cross-version-property-delete-hero.webp" alt="Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one." width="1280" height="720" />
+    <button class="detail-hero" id="heroZoom" type="button" aria-label="View full size: Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket.">
+      <img src="../assets/cross-version-property-delete-hero.webp" alt="Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket." width="1280" height="720" />
     </button>
     <p class="zoom-hint">Rendered headless by the example itself — click to zoom.</p>
     <div class="callout"><span class="tag">witnesses</span> Factory-empty has no active_object; property_unset raises TypeError and leaves the key; del removes it (clear_has=False). --skip-delete and --unset-instead exit 7.</div>
@@ -283,6 +283,8 @@ <h1>cross-version-property-delete</h1>
 <p><strong>What it witnesses:</strong> <code>property_unset</code> is a TypeError on a custom ID key and does <strong>not</strong> remove it. <code>del id_block[key]</code> does. After factory-empty, there is no <code>active_object</code>.</p>
 <p><strong>What failure each check would catch:</strong></p>
 <ul><li>exit 2 — someone set an active object; the snippet <code>__main__</code> would have been the only path</li><li>exit 3 — the ID property never landed</li><li>exit 4 — <code>property_unset</code> removed the key or failed to raise</li><li>exit 7 — <code>del</code> did not run (<code>--skip-delete</code> / <code>--unset-instead</code> falsify this: measured <code>clear_has=True</code>)</li></ul>
+<h2>Staging</h2>
+<p>The two tags now hang from the stand&#x27;s bar on steel rods. The bar used to run 0.17 m behind the plates with nothing joining them, and the &quot;rings&quot; were solid discs, so the plates hung on air. The bar spans both plates, the post rises to it, and the base is as wide as what it carries. Render path only: the check reads ID properties, never geometry.</p>
 <h2>Run</h2>
 <pre><code>blender --background --python cross_version_property_delete.py --
 blender --background --python cross_version_property_delete.py -- --output tags.png</code></pre>
@@ -508,6 +510,31 @@ <h2>Source</h2>
     <span class="k">for</span> ob <span class="k">in</span> stand:
         assign(ob, steel)
 
+    <span class="c"># Render-only staging: the check reads ID properties, never geometry.</span>
+    <span class="c"># The build left the bar 0.17 m behind the plates with nothing joining</span>
+    <span class="c"># them, and the &quot;rings&quot; are solid discs, so the plates hung on air.</span>
+    <span class="c"># Here the bar runs in the plates&#x27; plane above their tops, spans both,</span>
+    <span class="c"># and each plate hangs from it on two rods; the post rises to the bar</span>
+    <span class="c"># and the base is as wide as what it carries.</span>
+    post, base, bar = stand
+    plate_top = keep_plate.location.z + <span class="n">0.525</span>
+    bar_z = plate_top + <span class="n">0.16</span>
+    bar.location = (<span class="n">0.0</span>, <span class="n">0.0</span>, bar_z)
+    bar.scale.x = <span class="n">4.4</span> / <span class="n">2.6</span>
+    post.location = (<span class="n">0.0</span>, <span class="n">0.0</span>, <span class="n">0.5</span> * bar_z)
+    post.scale.z = bar_z / <span class="n">1.55</span>
+    base.location = (<span class="n">0.0</span>, <span class="n">0.0</span>, <span class="n">0.06</span>)
+    base.scale.x = <span class="n">4.6</span> / <span class="n">3.4</span>
+    hangers = []
+    <span class="k">for</span> plate <span class="k">in</span> (keep_plate, clear_plate):
+        <span class="k">for</span> dx <span class="k">in</span> (-<span class="n">0.62</span>, <span class="n">0.62</span>):
+            rod = cylinder(<span class="s">f&quot;</span><span class="s">Hanger</span>{len(hangers)}<span class="s">&quot;</span>, <span class="n">0.018</span>, bar_z - plate_top + <span class="n">0.05</span>,
+                           (plate.location.x + dx, <span class="n">0.0</span>, <span class="n">0.5</span> * (plate_top - <span class="n">0.03</span> + bar_z)), segs=<span class="n">12</span>)
+            assign(rod, steel)
+            hangers.append(rod)
+    <span class="k">for</span> ring <span class="k">in</span> (keep_ring, clear_ring):
+        ring.hide_render = <span class="k">True</span>
+
     inlay = <span class="k">None</span>
     <span class="k">if</span> KEY <span class="k">in</span> keep_plate.keys():
         inlay = add_inlay(<span class="s">&quot;Keep&quot;</span>, keep_plate)
@@ -554,13 +581,13 @@ <h2>Source</h2>
     light(<span class="s">&quot;Glint&quot;</span>, (<span class="n">1.6</span>, -<span class="n">5.0</span>, <span class="n">6.0</span>), <span class="n">850.0</span>, <span class="n">0.9</span>, (<span class="n">1.0</span>, <span class="n">0.9</span>, <span class="n">0.7</span>), (<span class="n">40</span>, <span class="n">0</span>, <span class="n">18</span>))
 
     aim = bpy.data.objects.new(<span class="s">&quot;Aim&quot;</span>, <span class="k">None</span>)
-    aim.location = (<span class="n">0.0</span>, <span class="n">0.0</span>, <span class="n">1.15</span>)
+    aim.location = (<span class="n">0.0</span>, <span class="n">0.0</span>, <span class="n">0.95</span>)
     aim.hide_render = <span class="k">True</span>
     scene.collection.objects.link(aim)
     cam_data = bpy.data.cameras.new(<span class="s">&quot;Cam&quot;</span>)
     cam_data.lens = <span class="n">50.0</span>
     cam = bpy.data.objects.new(<span class="s">&quot;Cam&quot;</span>, cam_data)
-    cam.location = (<span class="n">3.55</span>, -<span class="n">6.59</span>, <span class="n">3.30</span>)
+    cam.location = (<span class="n">3.95</span>, -<span class="n">7.35</span>, <span class="n">3.3</span>)
     scene.collection.objects.link(cam)
     scene.camera = cam
     track = cam.constraints.new(<span class="s">&quot;TRACK_TO&quot;</span>)
@@ -582,7 +609,7 @@ <h2>Source</h2>
     scene.render.filepath = path
     scene.view_settings.view_transform = <span class="s">&quot;Standard&quot;</span>
 
-    hero = [keep_plate, clear_plate, keep_ring, clear_ring] + list(stand)
+    hero = [keep_plate, clear_plate] + list(stand) + hangers
     <span class="k">if</span> inlay <span class="k">is</span> <span class="k">not</span> <span class="k">None</span>:
         hero.append(inlay)
     fcode = gallery_framing.check_framing(
@@ -646,7 +673,7 @@ <h2>Source</h2>
   </main>
   <dialog class="lightbox" id="lightbox" aria-label="Full-size render">
     <button class="lightbox-close" type="button" autofocus>Close</button>
-    <img src="../assets/cross-version-property-delete-hero.webp" alt="Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one." />
+    <img src="../assets/cross-version-property-delete-hero.webp" alt="Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket." />
   </dialog>
   <footer>
     <div class="statusbar">

docs/gallery/contact-sheets/cross-version-property-delete-contact-sheet.webp

@@ -552,7 +552,7 @@ <h2><a href="armature-bend/">armature-bend</a></h2>
       </article>
       <article class="card" data-tags="curves depsgraph rendering">
         <a class="card-media" href="text-version-stamp/" tabindex="-1" aria-hidden="true">
-          <img src="assets/text-version-stamp-hero.webp" alt="The word BLENDER above the Blender version number in large gold 3D characters." loading="lazy" decoding="async" />
+          <img src="assets/text-version-stamp-hero.webp" alt="The Blender version number in large gold 3D characters standing on a dark plinth, the word BLENDER set into its face." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="text-version-stamp/">text-version-stamp</a></h2>
@@ -849,7 +849,7 @@ <h2><a href="vertex-color-ao/">vertex-color-ao</a></h2>
       </article>
       <article class="card" data-tags="context properties">
         <a class="card-media" href="cross-version-property-delete/" tabindex="-1" aria-hidden="true">
-          <img src="assets/cross-version-property-delete-hero.webp" alt="Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one." loading="lazy" decoding="async" />
+          <img src="assets/cross-version-property-delete-hero.webp" alt="Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="cross-version-property-delete/">cross-version-property-delete</a></h2>
@@ -1047,12 +1047,12 @@ <h2><a href="wheelbarrow/">wheelbarrow</a></h2>
       </article>
       <article class="card" data-tags="mesh export showcase">
         <a class="card-media" href="anvil/" tabindex="-1" aria-hidden="true">
-          <img src="assets/anvil-hero.webp" alt="A black iron anvil mounted on a hooped timber stump." loading="lazy" decoding="async" />
+          <img src="assets/anvil-hero.webp" alt="A dark forged-steel anvil with a flared, squared waist, mounted on a hooped timber stump." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="anvil/">anvil</a></h2>
           <p class="teaches">A procedural blacksmith anvil on a timber stump 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: 2988 tris, two materials with 1040 wood and 822 metal faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.621×0.414×0.489 m, LOD ratios in band, convex collider 134 tris, hygiene 0, 16 grounded staves, hoop bite 0.003 m, foot-on-head gap 0.003 m, non-empty glTF. --skip-decimate exits 9; --stray-vert 15; --lift-z/--short-staves 16; --float-anvil 17; --round-band 18.</p>
+          <p class="witnesses"><span class="tag">witnesses</span> Recomputed: 3052 tris, two materials with 1040 wood and 854 metal faces, UVs in 0..1 with zero AABB overlap, outer AABB 0.621×0.414×0.489 m, LOD ratios in band, convex collider 134 tris, hygiene 0, 16 grounded staves, hoop bite 0.003 m, foot-on-head gap 0.003 m, waist corner reach 0.8572, non-empty glTF. --skip-decimate exits 9; --stray-vert 15; --lift-z/--short-staves 16; --float-anvil 17; --round-band 18; --round-waist 19.</p>
           <a class="card-link" href="anvil/">View showcase piece<span class="sr-only"> anvil</span> <span aria-hidden="true">&rarr;</span></a>
         </div>
       </article>
@@ -1102,7 +1102,7 @@ <h2><a href="hand-pump/">hand-pump</a></h2>
       </article>
       <article class="card" data-tags="mesh export showcase">
         <a class="card-media" href="signpost/" tabindex="-1" aria-hidden="true">
-          <img src="assets/signpost-hero.webp" alt="A wooden signpost with two pointed finger boards and dark iron bands on the post." loading="lazy" decoding="async" />
+          <img src="assets/signpost-hero.webp" alt="A wooden signpost with two pointed finger boards in worn cream paint and rusted iron bands on the post." loading="lazy" decoding="async" />
         </a>
         <div class="card-body">
           <h2><a href="signpost/">signpost</a></h2>

docs/gallery/cross-version-property-delete/index.html

@@ -24,6 +24,15 @@ no `active_object`.
 - exit 7 — `del` did not run (`--skip-delete` / `--unset-instead` falsify
   this: measured `clear_has=True`)
 
+## Staging
+
+The two tags now hang from the stand's bar on steel rods. The bar used
+to run 0.17 m behind the plates with nothing joining them, and the
+"rings" were solid discs, so the plates hung on air. The bar spans both
+plates, the post rises to it, and the base is as wide as what it
+carries. Render path only: the check reads ID properties, never
+geometry.
+
 ## Run
 
 ```bash

docs/gallery/index.html

@@ -207,6 +207,31 @@ def render_still(keep_parts, clear_parts, stand, path, engine):
     for ob in stand:
         assign(ob, steel)
 
+    # Render-only staging: the check reads ID properties, never geometry.
+    # The build left the bar 0.17 m behind the plates with nothing joining
+    # them, and the "rings" are solid discs, so the plates hung on air.
+    # Here the bar runs in the plates' plane above their tops, spans both,
+    # and each plate hangs from it on two rods; the post rises to the bar
+    # and the base is as wide as what it carries.
+    post, base, bar = stand
+    plate_top = keep_plate.location.z + 0.525
+    bar_z = plate_top + 0.16
+    bar.location = (0.0, 0.0, bar_z)
+    bar.scale.x = 4.4 / 2.6
+    post.location = (0.0, 0.0, 0.5 * bar_z)
+    post.scale.z = bar_z / 1.55
+    base.location = (0.0, 0.0, 0.06)
+    base.scale.x = 4.6 / 3.4
+    hangers = []
+    for plate in (keep_plate, clear_plate):
+        for dx in (-0.62, 0.62):
+            rod = cylinder(f"Hanger{len(hangers)}", 0.018, bar_z - plate_top + 0.05,
+                           (plate.location.x + dx, 0.0, 0.5 * (plate_top - 0.03 + bar_z)), segs=12)
+            assign(rod, steel)
+            hangers.append(rod)
+    for ring in (keep_ring, clear_ring):
+        ring.hide_render = True
+
     inlay = None
     if KEY in keep_plate.keys():
         inlay = add_inlay("Keep", keep_plate)
@@ -253,13 +278,13 @@ def light(name, loc, energy, size, col, rot):
     light("Glint", (1.6, -5.0, 6.0), 850.0, 0.9, (1.0, 0.9, 0.7), (40, 0, 18))
 
     aim = bpy.data.objects.new("Aim", None)
-    aim.location = (0.0, 0.0, 1.15)
+    aim.location = (0.0, 0.0, 0.95)
     aim.hide_render = True
     scene.collection.objects.link(aim)
     cam_data = bpy.data.cameras.new("Cam")
     cam_data.lens = 50.0
     cam = bpy.data.objects.new("Cam", cam_data)
-    cam.location = (3.55, -6.59, 3.30)
+    cam.location = (3.95, -7.35, 3.3)
     scene.collection.objects.link(cam)
     scene.camera = cam
     track = cam.constraints.new("TRACK_TO")
@@ -281,7 +306,7 @@ def light(name, loc, energy, size, col, rot):
     scene.render.filepath = path
     scene.view_settings.view_transform = "Standard"
 
-    hero = [keep_plate, clear_plate, keep_ring, clear_ring] + list(stand)
+    hero = [keep_plate, clear_plate] + list(stand) + hangers
     if inlay is not None:
         hero.append(inlay)
     fcode = gallery_framing.check_framing(

examples/cross-version-property-delete/README.md

@@ -632,7 +632,7 @@
       "name": "cross-version-property-delete",
       "dir": "examples/cross-version-property-delete",
       "teaches": "Custom ID properties are removed with del, not property_unset. The IDs are built through bpy.data.objects.new so the check does not depend on active_object.",
-      "alt": "Two framed display panels on a stand: the left shows a lit cyan screen, the right a blank grey one.",
+      "alt": "Two brass tags hanging from a stand on steel rods: the left shows a lit cyan inlay, the right a blank grey pocket.",
       "witnessesFix": "Factory-empty has no active_object; property_unset raises TypeError and leaves the key; del removes it (clear_has=False). --skip-delete and --unset-instead exit 7.",
       "hero": "docs/gallery/assets/cross-version-property-delete-hero.webp",
       "preview": "examples/cross-version-property-delete/preview.webp",