Rotate one polarizing filter: darken the overlap and restore it

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

1. Task and boundary

Rotate the front of two overlapping linear polarizing sheets through a dark orientation and back toward its starting orientation. Compare the overlap with a nearby uncovered part of the same illuminated background. The useful change is local brightness tied to relative filter angle.

This original, untested visual brief uses actual linear polarizing material or an accurate authorized illustration of that setup. Ordinary tinted plastic is not interchangeable. Exclude polarization equations, calibrated extinction claims, circular camera filters and automatic scene-wide exposure effects.

2. Authorized first frame

Use a photograph or accurate drawing you own or have permission to use. A large rear sheet is fixed before a broad softly illuminated panel. A smaller front sheet overlaps it and has a visible rim mark; one hand grips only the rim. Begin with a relatively bright overlap.

Show the front sheet almost face-on so its center and mark are readable. Leave a strip of the panel uncovered by either sheet as a brightness reference. Keep that strip within the same frame. Avoid detailed screen content, reflective glare and fingers covering the overlap.

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 linear polarizing sheets before one evenly illuminated panel, with a bright overlap and an uncovered reference strip. Keep the camera, illumination, rear sheet and panel fixed. The original hand rotates only the front sheet within its own plane around a steady center. As its rim mark approaches an orientation roughly a quarter turn from the start, make the overlap progressively darker while the uncovered reference strip stays steady. Then reverse the same rotation toward the original mark orientation so the overlap brightens again. Keep the filters separate, rigid and continuously overlapping; do not replace darkness with an opaque painted patch. Preserve the panel position and any existing broad background features through the changing transmission. Do not invent exact blackness or measured brightness values. End near the starting angle with the overlap restored and the hand still. No whole-scene fade, changing lamp, moving camera, tinted smoke, extra filter, cut or lettering.

1. Establish, first fifth: compare the bright overlap with the uncovered strip and identify the rim mark.
2. Darken, next two fifths: rotate the front sheet and follow the mark as the overlap dims.
3. Return, next fifth: reverse toward the initial angle and observe local brightness recovery.
4. Hold, final fifth: retain the restored overlap and steady uncovered reference.

5. Inspect the output

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

• Only the front sheet rotates; its center, rear sheet and panel stay in place.
• The overlap dims during outward rotation and brightens during the return.
• The uncovered reference remains steady enough to distinguish local transmission from a global fade.
• Filter edges and the rim mark remain continuous; the dark region follows their overlap.
• No opaque patch, color wash or replacement panel substitutes for the angle-linked change.
• If glare or automatic exposure changes the whole frame, judge local transmission inconclusive.

6. Fix one failure

• The entire image fades: preserve the uncovered strip and explicitly fix illumination and exposure appearance.
• The filter becomes painted black: retain its edge and underlying broad features at intermediate angles.
• Rotation changes the overlap area: keep the front center fixed and make the rear sheet larger.
• The return stays dark: preserve the original rim mark and ask to retrace that angle.
• Glare hides the change: revise the authorized viewing angle and use a softer illuminated background.

7. Ending and limits

Finish near the original front-sheet orientation with a brighter overlap and the unchanged uncovered reference.

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

No H3 execution, polarizer specification, transmission curve or measured extinction ratio is supplied. This is a proposed visual sequence, not optical certification.

The transparent-object task changes apparent background geometry through camera movement. This task fixes the view and changes local transmission through relative filter rotation. Different sheet colors or frame shapes would not change its purpose.