Bidirectional Optical Illusion Portrait

Create a bidirectional optical illusion portrait. When viewed in a normal upright posture (0° direction), the image must clearly show the left side profile of a young woman. When the image is rotated 180 degrees (phone upside down), the same composition must show the profile of an elderly woman. Two identities must share exactly the same contour structure and occupy the same spatial boundaries. Separate paintings, split screens, or overlays are not allowed. This transformation must be achieved purely through reinterpretation of contours and structural ambiguity. When designing the contour, it should be addressed: the chin of a young woman becomes the nose of an older woman after being rotated. The ears of young women become the eye sockets of older women. The neck line of young women becomes the mouth and chin structure of older women. Moiré interference surfaces are applied throughout the composition, employing ultra-fine radial or dual-frequency line patterns. The interference pattern must enhance depth without disrupting the bidirectional illusion. A strict monochrome palette. Black background (#0000000), structured only with white or light gray lines. Colorless. Apart from gradients caused by line density, there are no other gradients. No ambiguity. No texture noise. Ultra-precise vector alignment. High contrast. Clear silhouette edges. 8K ultra-high resolution. Aspect ratio: 4:5. This illusion must be clearly discernible in both directions.