# GPT Image Hub prompt

## Portrait à Illusion d'Optique Bidirectionnelle
- URL: https://www.gptimagehub.com/fr/library/dual-orientation-optical-illusion-portrait
- Generator URL: https://www.gptimagehub.com/fr/generate?promptId=oss-ym-mm-10302
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Ffr%2Flibrary%2Fdual-orientation-optical-illusion-portrait
- Category: Affiche et illustration
- Model: gpt-image-2-5-sunburst
- Aspect ratio: 4:5
- Style: illustration
- Tags: illusion d'optique, monochrome, art vectoriel, dessin au trait, portrait, minimaliste, moiré
- Updated: 2026-10-27T10:55:43.098Z
- Created: 2026-10-27T10:55:43.098Z

Génère un portrait monochrome en illusion d'optique révélant un visage à l'endroit et un autre à l'envers. Modifiez les sujets associés et les motifs linéaires pour adapter l'œuvre.

### Full prompt
```text
A dual-orientation optical illusion portrait. When viewed upright (0° orientation), the artwork clearly depicts [a young woman's left-facing side profile]. When rotated 180 degrees upside down, the exact same composition reveals [an elderly woman's side profile]. Both figures share identical contour lines and spatial boundaries with no split screens, overlays, or separate drawings. The transformation relies entirely on contour reinterpretation and structural ambiguity: the young woman's chin functions as the elderly woman's nose upon rotation; the young woman's ear forms the elderly woman's eye socket; the young woman's neckline forms the elderly woman's mouth and chin. Style: Moiré interference pattern rendered with ultra-thin radial or dual-frequency vector lines across the composition, creating optical depth without breaking the illusion. Strict monochrome palette with pure black background (#000000) and sharp white to light gray linework. Tonal gradients created solely through line density. Ultra-precise vector alignment, razor-sharp silhouette edges, no blur, no texture noise.
```