Ingouf Lainé

This 18th-century printmaker led a double life, by day, he engraved crisp portraits of Parisian nobility, and by night, he slipped satirical caricatures into the margins of the same plates. His secret weapon? A tiny chisel he used to scratch biting little details that only showed up under raking light.

You’ll spot his trick in H Beard Print Collection, where a prim duchess’s lace collar suddenly sprouts devilish horns if you tilt the page. Gallery Tiles keeps a set of those prints in the queue; tap H Beard and watch the light change the mood.