A security feature, by which a genuine document can readily be visually distinguished from a reproduction, employs finely detailed, laterally spaced structures to yield the illusion of a 3D texture. When replicated using commonly-available scanning or printing devices, the fine detail is lost, and with it the 3D illusion.

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< Optically variable surface pattern

< Media content creating and publishing system and process

> Integral variably printed special service mailing assembly and a method for using same

> Identification card with embedded halftone image security feature perceptible in transmitted light

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