Yangachi is a pseudonym, a name the Korean artist Cho Sung Jin chose once upon a time as his online ID. Still heavily invested in the tech world, he believes digital art is a psychic medium, a key to communication with distant universes. Within a gallery of ultraviolet walls, Yangachi arranges religious icons, metal-cast dolls, and sculptures and photographs that stress eyes, mouths, and sensory organs. It’s his own artful vision of a galaxy. —E.C.