From the shadows of tunnels to the fleeting velocity of steel in motion, Mark Madness’s work captures the raw intensity of a scene rarely paused for observation. The Barcelona-based photographer documents train graffiti as an act of beauty, risk, and resistance. In this interview, Mark opens up about his process, his influences, and the lessons learned after years of translating a marginal visual culture into powerful images. The conversation also revolves around his new book, Füü di Frei.