Part of the reason I visited Mary Judge up on St. Nicholas Avenue was because so many people told me I had to just so that I could see her studio. Purchased in November, Judge’s house has been carefully and selectively renovated — a ground-floor apartment became her high-ceilinged, light-bathed studio, for example, but the hallway leading to it remains papered in what one imagines is the floral remnants of the taste of some long-gone old Italian lady. Art-school tenants live upstairs while an old-school barbershop remains in business on the street.

Judge’s work evokes Renaissance engineering drawings and the patterns created by the spirograph toy my elementary school had, and sometimes, as in the work shown in this weekend’s “Draw” show at Norte Maar, many-times magnified chromosomes. The artist employs a technique called “spolvero” — “dusting,” in Italian — which through paper-folding, pinholes, and the application of powdered pigments imparts a symmetrical pattern, though with uneven tone, onto a paper or fabric surface.