The shorter adult becomes taller mid-wave
Keep the action and input; strengthen only the planted-foot and unchanged-proportion sentence, then compare the same hand-raised interval.
Task template
Two-person relative height: keep both adults on one ground plane
Keep the left adult visibly taller than the right adult through a small wave, without using depth changes, shoes or body stretching to alter their relationship. This is a visual planning exercise, not a height measurement.
Includes original practice inputs and a review checklist. This prompt has not been independently tested with the generation model.
Download the input image below and upload it manually in the generator; the button carries the prompt.
01Prepare the inputs
- Use the supplied fictional pair or an authorized full-body image in which both soles and both crowns are visible. A portrait crop cannot support the sole-to-crown comparison.
- Check that the two adults stand beside each other on the same flat ground. If one is on a step, farther away or bending a knee, settle that ambiguity before comparing stature.
- Assign the teal-coat adult to frame left and the rust-coat adult to frame right. Keep identities, clothing and screen sides attached to these roles.
- Read the observation diagram separately from the clean input. Upload only first-frame.png to image-to-video; the diagram contains guides for review and is not part of the scene.
02Prompt and procedure
Copyable prompt
Use the uploaded image as the opening composition. Two fictional adults stand side by side on the same level floor: the teal-coat adult on frame left is visibly taller than the rust-coat adult on frame right. Keep both at the same depth with both feet planted and both full bodies visible. Each raises one hand in a small greeting and lowers it. Keep head size, leg length, clothing and the difference in crown height consistent. The camera stays fixed. End with both hands down and both adults standing at their original positions.
Establish the shared baseline
Before writing motion, compare the two sole-contact lines. Note which crown is higher and retain that relationship in the brief; do not invent a centimeter value from the illustration.
Use one non-traveling action
Choose the small greeting so each person can remain at the original depth. Reject a draft that also asks one adult to approach the camera, because apparent size would then have another cause.
Inspect the hand-raised interval
Pause when both arms are highest. Compare crowns, shoulders, hems and planted feet; a growing torso can be hidden by the apparent energy of a wave.
Compare the settled pair
Use the ending as a second checkpoint, then replay the middle. Record the first frame where either foot slides or stature order changes, and revise only that cause.
03Check the result
- Both adults remain fully visible from crown to sole.
- Both sets of soles remain on the same floor plane without steps appearing.
- The teal adult remains taller in the opening, wave and ending.
- Neither person approaches the camera or changes depth to create a size difference.
- Head, torso and leg proportions do not expand during the wave.
- Left and right identities and coat colors remain assigned to the same adult.
- The ending restores hands down without knee bends or footwear changes.
04Troubleshoot and finish
One adult steps toward the lens
Replace only the greeting motion with a small wrist wave from the original standing position. Recheck sole positions before changing reference files.
The floor tilts or one person gains a step
Remove camera movement and keep the same shared floor visible. If the input itself has uncertain depth, replace that input rather than adding an unsupported numeric height.
Finish with the original standing arrangement. Save the crown-order and sole-contact observations alongside the draft; a visually plausible pair still does not establish either adult’s real-world height.
