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<h2>Pose-free difficulty curves &mdash; Ours included (Kubric-4D)<span class="dc-tag">Ours appears</span></h2>
<p class="dc-sub">Ours (<b style="color:#0a7d2c">VACE-14B</b>) does <b>not follow the exact GT target poses</b> of the
GCD / AnyView protocol, so it has <b>no reconstruction PSNR / mPSNR / LPIPS</b> on the pixel-aligned curves &mdash;
that is why it is absent from the headline difficulty chart. The metrics below are <b>pose-free</b>: they score the
generated video on its own terms rather than against a pose-locked GT frame. <b>Multi-view consistency</b> (MEt3R,
via DUSt3R) and <b>temporal flow-warp consistency</b> (optical-flow warp PSNR / EPE) <b>are computed for Ours</b>,
so Ours finally shows up across the full <b>30&#8594;180&#176;</b> difficulty sweep alongside every pose-following baseline.
Each method's curve is its <b>own rows[] aggregated per angle bin</b> (mean, nulls dropped) &mdash; the same
recipe for all methods, so the comparison is apples-to-apples.</p>
<p class="dc-binline">Pose-free clips scored for Ours per bin &mdash; 30&#176;: n=18 &middot; 60&#176;: n=18 &middot; 90&#176;: n=18 &middot; 120&#176;: n=19 &middot; 180&#176;: n=18. Only methods/metrics with scored data are drawn; nothing is interpolated or fabricated.</p>
<div style="margin:6px 0 4px"><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #1f77b4;border-radius:2px"></span>GEN3C</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #9467bd;border-radius:2px"></span>Voyager</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #8c564b;border-radius:2px"></span>FlexWorld</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #e377c2;border-radius:2px"></span>ViewCrafter</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #d62728;border-radius:2px"></span>FrameCrafter</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #ff7f0e;border-radius:2px"></span>NVS-Solver</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #7f7f7f;border-radius:2px"></span>TrajectoryCrafter</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:500;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:2.5px solid #17becf;border-radius:2px"></span>Shape-of-Motion</span><span style="display:inline-flex;align-items:center;gap:5px;margin:0 12px 6px 0;font-size:11.5px;font-weight:750;color:#1b1f24"><span style="display:inline-block;width:15px;height:0;border-top:4px solid #0a7d2c;border-radius:2px"></span>Ours · VACE-14B (Ours)</span></div>
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<div class="dc-cell"><svg viewBox="0 0 430 290" width="100%" preserveAspectRatio="xMidYMid meet" role="img" aria-label="Multi-view consistency (MEt3R) vs camera-angle bin" style="font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#fff"><text x="52" y="16" font-size="13" font-weight="700" fill="#0b2545">Multi-view consistency (MEt3R)</text><text x="416" y="16" font-size="9.5" text-anchor="end" fill="#8a929c">&#8595; lower better</text><line x1="52" y1="250.0" x2="416" y2="250.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="253.0" font-size="9" text-anchor="end" fill="#6b7480">0.000</text><line x1="52" y1="195.0" x2="416" y2="195.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="198.0" font-size="9" text-anchor="end" fill="#6b7480">0.040</text><line x1="52" y1="140.0" x2="416" y2="140.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="143.0" font-size="9" text-anchor="end" fill="#6b7480">0.080</text><line x1="52" y1="85.0" x2="416" y2="85.0" 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text-anchor="end" fill="#8a929c">&#8593; higher better</text><line x1="52" y1="250.0" x2="416" y2="250.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="253.0" font-size="9" text-anchor="end" fill="#6b7480">19.2</text><line x1="52" y1="195.0" x2="416" y2="195.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="198.0" font-size="9" text-anchor="end" fill="#6b7480">29.9</text><line x1="52" y1="140.0" x2="416" y2="140.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="143.0" font-size="9" text-anchor="end" fill="#6b7480">40.5</text><line x1="52" y1="85.0" x2="416" y2="85.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="88.0" font-size="9" text-anchor="end" fill="#6b7480">51.2</text><line x1="52" y1="30.0" x2="416" y2="30.0" stroke="#eef1f5" stroke-width="1"/><text x="46" y="33.0" font-size="9" text-anchor="end" fill="#6b7480">61.8</text><line x1="52" y1="250" x2="416" y2="250" stroke="#c2ccd6" stroke-width="1.2"/><line x1="52.0" y1="250" x2="52.0" y2="254" stroke="#c2ccd6" 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fill="#3a4452">180&#176;</text><text x="234.0" y="286" font-size="9.5" text-anchor="middle" fill="#54606e">camera-angle bin (optical-axis change from input view)</text><text x="13" y="140.0" font-size="9.5" text-anchor="middle" fill="#54606e" transform="rotate(-90 13 140.0)">TSED inlier frac</text><path d="M52.0,77.9 L143.0,166.7 L234.0,202.4 L325.0,219.3 L416.0,220.0" fill="none" stroke="#1f77b4" stroke-width="1.6" stroke-linejoin="round" stroke-linecap="round" opacity="0.92"/><circle cx="52.0" cy="77.9" r="2.1" fill="#1f77b4"/><circle cx="143.0" cy="166.7" r="2.1" fill="#1f77b4"/><circle cx="234.0" cy="202.4" r="2.1" fill="#1f77b4"/><circle cx="325.0" cy="219.3" r="2.1" fill="#1f77b4"/><circle cx="416.0" cy="220.0" r="2.1" fill="#1f77b4"/><path d="M52.0,123.4 L143.0,170.9 L234.0,200.8 L325.0,203.9 L416.0,232.7" fill="none" stroke="#9467bd" stroke-width="1.6" stroke-linejoin="round" stroke-linecap="round" opacity="0.92"/><circle cx="52.0" cy="123.4" r="2.1" fill="#9467bd"/><circle 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</div>
<p class="dc-take"><b>Takeaway:</b> on the pose-free axes Ours holds up <b>flat across the whole difficulty sweep</b>:
multi-view consistency <b>MEt3R stays low (0.011&#8594;0.016, 30&#176;&#8594;180&#176;)</b> and
temporal <b>flow-warp PSNR stays high (&#126;44.5&#8594;43.8&nbsp;dB)</b> with mean flow EPE
near-constant (&#126;0.251&#8594;0.279&nbsp;px) &mdash; the warp-anchored generation does not
fall apart as the camera swings to the hard back-views, whereas several pose-following baselines lose multi-view /
temporal consistency at 120&#8211;180&#176;. These axes do <b>not</b> reward GT-pose matching, so they are the fair
place to read Ours against the field.</p>
<p class="dc-note">x = camera-angle bin (optical-axis change vs. input view). MEt3R &amp; flow EPE lower-is-better;
flow-warp PSNR &amp; TSED inlier-fraction higher-is-better. <b>FID is reported only as a single per-method aggregate,
not per bin</b> (no per-bin FID exists in the data, and Ours has no aggregate FID either), so we chart
<b>flow EPE</b> in its place rather than fabricate a per-bin FID curve. Every method's curve is computed by
aggregating its own rows[] by angle bin (mean, nulls dropped); i2v-base has no flow metrics and is omitted.
Charts are inline SVG &mdash; fully offline, no external libraries.</p>
</section>