Skull in Glass Terrarium Tattoo QR Code for Apparel

About this design

A skull rests inside a rounded glass terrarium, drawn in black ink with fine hatching on the jaw and a soft shadow under the base. The cranium and eye sockets carry the dark modules, and one socket pair plus a square frame above the skull act as the finder squares. Ink splatter dots scatter around the skull and pull the eye across the pattern. Pure black on white gives the modules strong contrast, while the thin glass outline stays light and keeps the data area clear.