Iris van Harper-inspired avant-garde silvery metallic gown, blending retrofuturistic design elements with modern couture elegance, depicted in a hyperrealistic 3D render. The dress features intricate geometric patterns and fluid, reflective surfaces that catch the studio light beautifully. Captured in 8k, the full-body concept art emphasizes the artistic blend of past and future, portraying a visionary fashion statement in an octane-rendered fashion photograph.