New York City-based artist Kumi Yamashita creates incredibly labor-intensive portraits out of simple materials. Her “Constellation” portraits are each made of a single thread wound around a network of nails in a process that takes several months. To make her “Warp and Weft” portraits, Yamashita selectively cuts away threads from denim fabric. Her work is on display at the Scott White Contemporary Art gallery in La Jolla, California, April 20 through June 1, 2013. She has much more work on her website.