Slide one grid and follow the broad moiré bands

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

1. Task and boundary

Slide one transparent line grid a short distance across a stationary line grid with a slightly different spacing. Follow broad dark and light bands inside their overlap while retaining a visible reference for each physical sheet. The broad bands are an overlap pattern, not additional moving objects.

This is an original, untested composition brief. Use existing readable grids whose overlap already shows broad bands in the authorized first frame. Exclude camera aliasing as a substitute, fluid waves, shadow animation and mathematically calibrated displacement claims.

2. Authorized first frame

Prepare your own or authorized photograph or accurate drawing of two parallel vertical-line grids. Their slightly different line spacings create several broad overlap bands. Fix the lower sheet to a plain surface and give the upper sheet one visible corner tab held by an original hand.

Use a locked face-on view with sheet margins exposed on at least two sides. Include a small lower-sheet corner marker and enough upper-sheet travel space for roughly one line spacing. Avoid reflections, extremely dense lines and perspective that makes the original grid geometry unreadable.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the prompt; check settings and cost before submission. Nothing runs automatically.

4. Prompt and timing

Start from my authorized image of two overlapping transparent vertical-line grids with slightly different spacing, already showing broad moire bands. Lock the camera, lighting, lower sheet and its corner marker. The original hand slides the upper sheet slowly rightward by a small distance, roughly one of its line spacings, without rotating it. Preserve each sheet’s straight parallel lines, spacing and rigid boundaries. As the relative line alignment changes, let the broad dark and light overlap bands migrate coherently across the shared region. Keep these bands as the result of the two visible line patterns; do not create solid ribbons, liquid waves or drifting shadows. Show the upper corner tab moving with its sheet while the lower marker stays fixed. Lines outside the overlap retain their original appearance. Stop the upper sheet, then keep the overlap pattern still at the new alignment. No camera zoom, grid stretching, dissolving lines, added third grid, cut, labels or repeated slide.

1. Establish, first fifth: identify both sheet references, fine line direction and several existing broad bands.
2. Slide, middle three fifths: compare early, middle and late alignments while following the upper tab and broad bands separately.
3. Hold, final fifth: stop the upper sheet and check whether the apparent band migration also stops.

5. Inspect the output

For each check, record a frame or time, observation and pass, fail or inconclusive judgment.

• The lower corner marker stays fixed while the upper tab shows a short straight translation.
• Each sheet retains straight lines and consistent spacing rather than deforming to animate the bands.
• Broad band changes are confined to the region where the two original grids overlap.
• Fine grid motion and broad band motion remain distinguishable in intermediate frames.
• After the slide stops, the new overlap pattern stays still without continuing independent waves.
• If output resolution erases the fine grids, mark the overlap mechanism inconclusive even when broad stripes remain.

6. Fix one failure

• The broad bands become floating ribbons: describe them as visible overlap contrast, keeping both underlying grids readable.
• Lines bend during the slide: constrain rigid planar translation and reduce travel.
• Everything drifts together: anchor the lower corner marker and expose more fixed-sheet margin.
• The bands continue after stopping: tie their change to relative alignment and request a final static comparison.
• The grid becomes a flickering texture: use wider line spacing in the authorized input and a shorter, slower slide.

7. Ending and limits

Finish with two unchanged grids at a new relative offset and one stationary broad-band overlap pattern.

Save your result, authorized input, exact prompt, settings and inspection notes.

No H3 result, sampling test, spatial-frequency calculation or guaranteed band-travel ratio is supplied. A generated pattern cannot establish print precision or display calibration.

The light-trail task leaves fading history behind a moving source. Here stationary and sliding grids create a changing overlap pattern that stops with their relative motion. A different line color alone remains the same task.