DESIGN BRIEF: chauk-central digital-fusion for India's UPI payment ritual — how a QR code reads as sacred-centre square geometry without lagnacha marriage confusion or tarpa default. Chauk-central means QR square occupies centre register like village ritual enclosure, with phone-holding figure and vendor dots at margin completing payment scene. What we refused: tarpa musicians, wedding Palghat pot inside square, photoreal PhonePe branding, rainbow app UI. What we kept: chauk-square frame, interior dot-matrix QR suggestion, triangle figure with phone rectangle, vendor bowl circle, hut square corner. Light-mid density (~45% fill).