Reference-led holographic-foil packaging

A macro view of a plain matte kraft gift box wrapped with a broad band of unprinted holographic foil, a small hard source from lower right igniting spectral ribbons that stay inside the foil boundary. No letters, words, signs or logos anywhere in the image. A real photograph in the packaging detail genre, a 100mm macro set to f/5.6 on digital, tight plane of focus on the foil region, fine metallic texture and a crisp low-noise finish. One small hard source strikes at a steep grazing angle from the lower right, igniting the diffractive foil with angle-dependent spectral bands, thin ribbons shifting hue across the grain yet staying strictly inside the foil's boundary. Neighbouring ink and paper keep their ordinary flat finish. The overall grade stays neutral and faithful, letting the prismatic accent carry the colour.