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fix: bake-normal-high-to-low and lightmap-uv-channel quality pass (#244)
* fix(examples): stand the bake-normal panels in plinths
Render path only. Both panels balanced on an edge and the leaning plate
pierced the floor; each now stands in a low plinth, lifted so its lowest
evaluated point seats 35 mm in the slot. The solidify rim wears plain
bronze rather than the baked map. Bake statistics (frac 0.7211, MAD
0.09356) and exit codes unchanged on all three binaries.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>
* fix(examples): raise the lightmap cart posts into its canopy
The four 1.35 m posts stopped 0.33 m under the canopy arc, so the canopy
floated. Each post now rises into the arc's underside at its own station,
its top sheared to the arc for a uniform 12 mm bite. Every part keeps its
UV1 island count, zero overlap and minimum island distance; exit codes are
unchanged on all three binaries. Also refreshes the gallery alts and index
for both examples.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>
---------
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
<metaproperty="og:image:alt" content="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern." />
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<metaproperty="og:image:alt" content="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths." />
<metaname="twitter:description" content="A collapse-decimated hatch plate receiving a Cycles cage-baked tangent normal map from a ribbed high-poly source" />
<metaname="twitter:image:alt" content="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern." />
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<metaname="twitter:image:alt" content="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths." />
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<style>
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/* fonts are deployed by the landing build (docs/fonts/) */
<p>A collapse-decimated hatch plate receiving a Cycles cage-baked tangent normal map from a ribbed high-poly source</p>
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</header>
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<mainid="main">
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<buttonclass="detail-hero" id="heroZoom" type="button" aria-label="View full size: A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern.">
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<imgsrc="../assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern." width="1280" height="720" />
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<buttonclass="detail-hero" id="heroZoom" type="button" aria-label="View full size: A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths.">
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<imgsrc="../assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths." width="1280" height="720" />
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</button>
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<pclass="zoom-hint">Rendered headless by the example itself — click to zoom.</p>
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<divclass="callout"><spanclass="tag">witnesses</span> Statistical gates not byte-identity: detail frac 0.7211 / MAD 0.09356 vs flat 0.0000 / 0.00277; --flat-source exits 5; type=NORMAL not bake_type; RNA identical on 4.5.11, 5.1.2, 5.2.1</div>
<ul><li><strong>Detail bake is not flat.</strong><code>frac >= 0.40</code> and <code>MAD >= 0.05</code> (measured 0.7211 / 0.09356 on 4.5.11, 5.1.2, and 5.2.1). Catches an inactive Image Texture node, reversed selection, or EEVEE/GPU mis-setup that writes a blank map. MAD floor is half the measured hatch value, still ~30× a flat bake.</li><li><strong>Flat control is flat.</strong><code>frac <= 0.05</code> and <code>MAD <= 0.03</code> (measured 0.0000 / 0.00277). Catches a noisy or wrongly-typed bake that would also satisfy the detail gates.</li><li><strong>Monotonic gap.</strong><code>detail_frac - flat_frac >= 0.30</code>. The two maps must separate; a tolerance wide enough to pass both would have no discriminating power.</li><li><strong><code>--flat-source</code> is the falsifier.</strong> Skips the ribs and still runs the detail gates. Must exit 5. Analogous to <code>--same-axis</code> in <ahref="https://github.com/TMHSDigital/Blender-Developer-Tools/tree/main/examples/export-preset-axis"><code>export-preset-axis</code></a>.</li></ul>
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<p>Neighbor of <ahref="https://github.com/TMHSDigital/Blender-Developer-Tools/tree/main/examples/lod-decimate-chain"><code>lod-decimate-chain</code></a> (the LOD is the cage target; collapse keeps UVs) and <ahref="https://github.com/TMHSDigital/Blender-Developer-Tools/tree/main/examples/image-pixels-testcard"><code>image-pixels-testcard</code></a> (<code>save_render</code>, not <code>Image.save()</code>, if you persist the datablock). UV transfer and atlas packing are out of scope.</p>
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<p>The still stages the baked map as an unlit card beside the LOD wearing it. If the bake were flat, the card would be uniform <code>(128, 128, 255)</code> periwinkle and the plate would shade like the undisplaced cage.</p>
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<p>Staging is render-only. Each panel stands in a low display plinth, lifted so its lowest evaluated point sits 35 mm in the slot. Both panels used to balance on an edge, and the leaning plate pierced the floor. The solidify rim wears plain bronze instead of the baked map. The slight waviness along the plate's border is the bake itself, normal-map shading inside the UV margin, and is left as the map produces it. Bake statistics are unchanged: frac 0.7211, MAD 0.09356 on all three binaries.</p>
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<p>Operator RNA (<code>type='NORMAL'</code>, <code>use_selected_to_active</code>, <code>cage_extrusion</code>, <code>cage_object</code> as a string, <code>normal_space='TANGENT'</code>, <code>margin_type</code>) is identical on 4.5.11, 5.1.2, and 5.2.1 — no shim.</p>
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<h2>Run</h2>
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<pre><code># Cheap correctness check (no render) - the CI check:
<imgsrc="../assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern." />
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<imgsrc="../assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths." />
<imgsrc="assets/lightmap-uv-channel-hero.webp" alt="A wooden covered cart beside a board showing its packed lightmap UV atlas as coloured islands." loading="lazy" decoding="async" />
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<imgsrc="assets/lightmap-uv-channel-hero.webp" alt="A wooden covered cart, its four posts carrying an arched canvas canopy, beside a board showing its packed lightmap UV atlas as coloured islands." loading="lazy" decoding="async" />
<imgsrc="assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern." loading="lazy" decoding="async" />
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<imgsrc="assets/bake-normal-high-to-low-hero.webp" alt="A baked tangent-space normal map shown as a lilac card beside a bronze plate wearing it, with a radial embossed pattern, both standing in low display plinths." loading="lazy" decoding="async" />
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