2f9f21d7c1
motion-census says in its own header that it cannot do this: "a wrong ramp that moves every frame passes here." So having restored the motion, this checks the shape. Pre-registered from the disc. palogo_sqex_eff declares 0:0 -> 15:255 -> 30:212 -> 45:0, so three straight runs with breakpoints at 15 and 30, the middle slope ~1/5 the magnitude of the last, and the rise ~1.2x the last. Measured from a FILM of a real boot, on the companion's top strip (686x11+299+319) which no other element overlaps, so it is that element's own alpha rather than a composite: units 5.6-13.0 +0.00509 /unit rise units 16-28 -0.00090 /unit gentle fall units 31-43 -0.00423 /unit steep fall unit 46.4 0.00000 gone Breakpoints land where declared: the rise stops between 13.0 and 16.1, the gentle fall steepens between 28.4 and 31.4. ratio middle:last declared 0.203 measured 0.213 (within 5 %) ratio rise:last declared 1.20 measured 1.20 (exact) So the port interpolates piecewise-linearly across the declared segments, which is what the Decoder independently measured the game doing -- 28 distinct alphas over 28 consecutive presents, modal steps -3 and -14 against predicted -2.87 and -14.13. ⚠️ RATIOS, NOT ABSOLUTES, and deliberately. The strip mean is an alpha scaled by the sprite's own pixels; its absolute value carries the texture. A ratio between segments divides that out, which is the only reason the shape is checkable from a composite at all. What this does NOT establish, stated rather than implied: that it LOOKS right -- three instruments have now agreed with a picture a human called wrong, and a fourth agreeing does not change the standing of the fifth. Nor anything about the developer splash's three pairs. Nor the absolute alpha. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018AHUQvXGyNcKonSEWsgWcX
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The splash: frozen, then fixed, and now checked for SHAPE as well as motion
Status: ✅ animates, and the ramp matches the declared curve. Written
2026-09-02 by the Port; HANDOFF on this branch answers 9ca1eb5.
The 2026-09-02 play-test found the splash frozen. The cause and the fix are in
the commit history; this page is the part that comes after — is the animation
now the right animation? motion-census says explicitly that it cannot answer
that: "a wrong ramp that moves every frame passes here."
Pre-registered (R2)
palogo_sqex_eff declares 0:a=0 → 15:a=255 → 30:a=212 → 45:a=0 — three
segments, three gradients:
| segment | declared |
|---|---|
| 0 → 15 | +17.0 per unit |
| 15 → 30 | −2.87 per unit |
| 30 → 45 | −14.13 per unit |
So a film should show three straight runs with breakpoints at 15 and 30, the middle slope about 1/5 the magnitude of the last, and the rise about 1.2× the last.
Measured, from a film of a real boot
Region: 686x11+299+319 — the companion's top strip, which no other element
overlaps, so the number is that element's own alpha and not a composite.
| view units | strip mean | slope/unit |
|---|---|---|
| 5.58 | 0.02809 | |
| 10.00 | 0.05086 | +0.00515 |
| 13.04 | 0.06611 | +0.00503 |
| 16.12 | 0.07530 | +0.00298 ← crossing the breakpoint |
| 19.21 | 0.07260 | −0.00087 |
| 25.38 | 0.06695 | −0.00092 |
| 28.39 | 0.06482 | −0.00071 |
| 31.39 | 0.05719 | −0.00254 ← crossing the breakpoint |
| 34.39 | 0.04471 | −0.00416 |
| 40.39 | 0.01910 | −0.00428 |
| 43.39 | 0.00655 | −0.00418 |
| 46.39 | 0.00000 | gone |
Breakpoints land where declared: the rise stops between 13.0 and 16.1, the gentle fall steepens between 28.4 and 31.4.
| ratio | declared | measured |
|---|---|---|
| middle : last | 0.203 | 0.213 |
| rise : last | 1.20 | 1.20 |
Within 5 % and exact respectively. The port interpolates piecewise-linearly across the declared segments — which is what the Decoder independently measured the game doing (28 distinct alphas over 28 consecutive presents, modal steps −3 and −14 against predicted −2.87 and −14.13).
⚠️ Ratios, not absolutes, and deliberately. The strip mean is an alpha scaled by whatever the sprite's own pixels are; its absolute value carries the texture. A ratio between segments divides that out, which is why the shape is checkable from a composite at all. Anyone quoting 0.00515 as an alpha is misreading it.
What this still does not establish
- That it looks right. Three instruments have now agreed with a picture a human called wrong, and the fourth agreeing does not change the standing of the fifth. A play-test is the check.
- Anything about the developer splash's three logo/companion pairs. One element, one screen.
- The absolute alpha. The shape matches; whether the port's alpha equals the
game's at a given unit is
verify-capture's question, and it answers 0.01 % at the settled pose only.