GALLERY TECHNOLOGY MIT graduate Jim Campbell used custom-made software, LED (light-emitting diodes) displays, resin, Plexiglas, and still photographs to create the glowing panels in the exhibit “Material Light,” which closes Saturday. “Library” (2004) is Mr. Campbell’s first combination of LED and traditional photography. He began by making a 30-minute movie focused on the New York Public Library steps. The final product, an LED display on top of a photogravure, is a flickering screen in which the figures on the library steps seem like ghosts. Through Saturday, 11 a.m.-6 p.m., Bryce Wolkowitz Gallery, 601 W. 26th St. at Eleventh Avenue, no. 1240, 212-243-8830, free.

TEA AND TRUTH Photographs by Costa Rican artist Priscilla Monge are on display through this weekend. In the series “The Artist Reveals Mystic Truth,” Ms. Monge photographed teacups coated in thick brown coffee, then scrawled with Spanish phrases. Each epigram ends with the words “a matter of life and death,” which is also the name of the exhibit. Through Saturday, 10 a.m.-6 p.m., Yancey Richardson Gallery, 535 W. 22nd St., between Tenth and Eleventh avenues, 646-230-9610, free.

LINE MEDITATIONS Abstract geometric paintings by Anil Revri are on display through this weekend at Sundaram Tagore Gallery. “Quantum” includes works from the series “Cultural Crossings,” which explores the similarities among major religions. Some of the precisely rendered artworks resemble windows overlooking outer space; others are simply mesmerizing patterns. Mr. Revri has said that his work is inspired by Eastern philosophy and that “each piece becomes a meditation.” Mr. Revri was born in New Delhi, India, and is now based in Washington, D.C. Through Sunday, daily, 11 a.m.-7 p.m., Sundaram Tagore Gallery, 137 Greene St., between Prince and Houston streets, 212-677-4520, free.

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