On the main east-west drag in Marfa, Texas, the Art Blocks house/gallery sits between an upscale prix fixe restaurant and a church. With four bedrooms, three baths, a large yard, and a freestanding garage, it’s a fairly large house for the town. It would be a rather inconspicuous one were it not for the large mural painted on the north wall of the garage, composed of bright colors and wavy abstract figures floating against a whitewashed wall. Although hand-painted…