The Digital Metallic Problem
Physical metallic color is a surface property: reflectance that varies with viewing angle and light source position. A real gold object looks different from above, from the side, and in different lighting conditions — this variability is what makes physical metallic look precious. Digital color cannot reproduce this behavior by default. A flat #FFD700 (gold hex) is an orange-yellow with no directional reflectance, which is why so much digital gold reads as yellow or cheap. The challenge of digital metallic is to simulate reflectance behavior using static color — primarily through gradients that encode the highlight, midtone, and shadow of a directionally lit metallic surface.
