Furthermore, Castella uses digital technology to slightly alter the appearance of his cityscapes, so that one's initial response is gradually subverted into recognition that all is not what it appears to be. Colors are muted, and distant horizons fade off into a crystalline haze. Fascinated by architectural design, Castella sees his artistic role as that of translator—by accepting and subverting the reality before the camera and the traditional role of documentary photography, he explores the relationship between the real world and the realm of the imagination.