Michael James OwusuCreative technologist

02 · Campaigns

Campaigns · Self-initiated concept

Nula earplugs

Skin-tone earplugs in two colourways. The set needed matched angles in both colours, believable fit on real ears, and a written method for adding angles without the product drifting.

At a glance

Role

Art direction, prompting and selection. Wrote the consistency method and the product rules.

Tools

  • Content Studio Engine (CLI)
  • Gemini 3 Pro Image
  • Gemini Omni Flash (film)
  • HTML ad templates

Outcomes

  • Matched product angles in both colourways, made by changing colour only on approved angles.
  • Fit and scale images checked against written product rules, such as the ring sitting coaxial with the ear canal.
  • Eleven ads across feed, story and square formats, and an 8-second film.

Links

A pair of brown ring-shaped earplugs with soft tips on white.The same pair of earplugs in pale beige.
Hero plates in both colourways. New angles start from these.

The method

  1. A pair of brown ring-shaped earplugs with soft tips on white.
    1. Hero plate Approved first, in one colourway.
  2. Two brown earplugs upright and face-on, one showing the bore in its tip.
    2. New angle The hero plate is the only reference, plus one short rotation instruction.
  3. The same face-on angle in pale beige.
    3. New colourway The approved angle is the only reference; the prompt changes colour and nothing else.

"Any second reference gives the model two things to reconcile and it invents a compromise shape."

"Do NOT generate a new angle in a new colour from the hero plate — it snaps back to the hero pose."

"Terse and positive. Never write negation lists — naming a forbidden element reliably summons it."

Quoted from the approved set's manifest, 17 August 2026.

A colourway prompt

  1. Lock the photographThe exact same photograph as the reference image: same camera angle, same two earplugs, same shapes, proportions, positions and lighting.
  2. The one changeChange only the colour, from brown to a pale warm skin-tone beige, keeping the matte tip and glossy loop.
  3. GroundPure white background.
The same loops-to-camera angle in pale beige.
Output
Full prompt as sent

The exact same photograph as the reference image: same camera angle, same two earplugs, same shapes, proportions, positions and lighting. Change only the colour, from brown to a pale warm skin-tone beige, keeping the matte tip and glossy loop. Pure white background.

Nula run version 12. Reference: the approved brown loops angle.

The product set

Two brown earplugs upright and face-on, one showing the bore in its tip.
The same loops-to-camera angle in pale beige.
A round brown carry case with a debossed nula wordmark and a keyring loop.
A pale case open with both earplugs seated in their wells.
Overhead kit: the closed case in the centre, a pair of earplugs on the left and four spare tips on the right.
Brown earplugs on a travertine slab with space for copy.

Product rules used for QC

Written down after early passes got them wrong, then used to accept or reject every fit image.

  • Tip offset

    The hooked stem holds the ear tip outside the loop circle, so the hoop opening reads clear from every angle.

  • Worn fit

    The ring sits coaxial with the ear canal, low and forward behind the tragus, about a quarter of the visible concha. Earlier passes placed it too high, too central and too large.

  • Colourway

    The colourway matches the wearer's skin tone. The product is meant to disappear, not contrast.

Fit and scale

Profile of a man looking upwards with a brown earplug in his ear, against white.
Close crop of a fair-skinned ear wearing a pale earplug.
A brown earplug held between thumb and forefinger to show its size.
A woman asleep on a pillow wearing a pale earplug.

Record

Runs
37 runs for the campaign set plus 2 for product sheets. All 23 approved images match a run output byte for byte.
Recorded cost
$9.03 at listed prices.
Resolution
2K masters, with the worn, ear and sleep images at 4K.