The corner of the studio holds Gruzis’s supplies, including a variety of protractors and 10 types of squirrel-hair brushes. (“When my dog comes here, he stands over by the brushes and is, like, sniffing the air,” he jokes.) Physically speaking, he starts by soaking, stretching, and sealing the edges of thick watercolor paper using traditional methods. Then he unstretches the paper, crops the edges, and begins to paint.