Tilt the level vial and follow the same bubble back between its marks

Original, untested video brief. No input image or generated result is supplied.

1. Task and boundary

Follow one visible bubble inside a correctly drawn curved level vial. Begin with the bubble between the original center marks, raise one end slightly, then return the vial to its starting orientation. The bubble moves within the enclosure and comes back toward the marked center. The task depends on relative position: moving the entire vial and bubble together across the frame does not demonstrate an internal response.

This is an original, untested visual brief, not a level calibration or a measurement of angle. Use a modest tilt of an appropriate curved vial, with enough time to observe the bubble before returning. Do not infer numerical accuracy, sensitivity or response time from this proposed shot. The transparent enclosure remains sealed throughout.

2. Authorized first frame

Supply an owned or permitted accurate photograph or drawing of a simple spirit-level vial in a small tilting holder. Show the curved internal chamber, one enclosed bubble and two existing center reference lines. A side view should make the bubble’s position along the vial easy to compare with the marks. Place a stationary horizontal reference line behind the holder so the vial’s actual tilt is visible.

The holder pivots near its center and an original tab allows its left end to be raised a little. Start with the bubble between the marks. Keep reflections modest, avoid embossed text over the chamber and leave room at both ends of the bubble’s intended travel. A straight decorative tube without suitable vial geometry is not an adequate substitute.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the complete prompt, check the available settings and cost estimate, then submit only when ready. This page supplies text; it does not upload an image or start a generation.

4. Prompt and timing

Keep the camera and background reference still in my authorized level-vial scene. Start with the one original bubble between the two original center marks. Raise the holder’s left end slowly by a small amount around its existing central pivot. Let the same enclosed bubble move toward the raised side inside the curved chamber while the vial and its marks tilt together. Pause briefly, then return the holder to its initial orientation. Let the bubble move back toward the original center marks and settle between them. Preserve the sealed chamber, one bubble and the original marks. Do not move the marks to chase the bubble, split it into several bubbles, empty the liquid or let it leave through an invented opening. Do not translate the entire scene to imitate internal motion. No numerical angle display, camera tilt, cut or extra rocking cycle.

1. Opening: locate the original bubble, two marks and stationary background reference.
2. Tilt and pause: compare the changing vial angle with the bubble’s movement relative to the marks.
3. Return: restore the original vial orientation before inspecting the bubble’s final position between the same marks.

These beats are author suggestions, not exact model timing guarantees. Adapt their proportions to the clip length actually available.

5. Inspect the output

After inspecting your own output, record a time or frame, visible observation and pass, fail or inconclusive judgment for each condition. A convincing ending alone does not verify the preceding action.

• Exactly one identifiable bubble remains inside the original sealed chamber.
• The vial and its center marks tilt together relative to the fixed background reference.
• The bubble changes position relative to those marks toward the raised side.
• The original marks do not slide along the chamber or change spacing.
• After the holder returns, the same bubble comes back between the original marks.
• If reflection or curvature hides a bubble edge, mark position and centering checks inconclusive instead of estimating through the glare.

6. Fix one failure

• The bubble stays glued to the marks: emphasize relative travel and keep the background reference fixed.
• The marks move to recenter it: preserve their original positions on the vial wall.
• The bubble splits: use one broad readable bubble and reduce the tilt range.
• The bubble leaves the enclosure: keep both sealed ends in view and remove splash language.
• The return happens too quickly to inspect: shorten the tilt and leave a longer quiet final interval without specifying exact model timing.

7. Ending and limits

End with the holder back at its original angle and the same bubble visible between the same two center marks. Keep the sealed vial and background unchanged.

Save your own generated result through the available result controls, together with the authorized input, exact prompt, settings and inspection notes.

No generated result or physical level test is supplied. The visible return does not verify calibration, true horizontality, manufacturing quality or exact bubble dynamics. It is a proposed observation of relative motion within one depicted enclosure, with uncertain views left unresolved.

The connected-vessels exercise follows two free liquid levels through an opened connection. This task keeps one curved vial sealed and follows an enclosed bubble relative to marks as the whole vial tilts and returns; no valve or transfer between containers is involved.