What would happen if a machine and a graffiti writer collaborated? This book seeks answers - Alone HM, Alsino Skowronnek, Theodor Guelat, and Team Flight Mode join forces on a journey into unchartered territory. Their adventure delivers unusual results, influenced by artificial intelligence: partly painted by machines, painted onto machines - from neural to railway networks. Gradient Descent is about amalgamating aspects of pioneering, experimenting, and modifying - hence translating old-school aesthetics into the modern-day digital age, preserving and sometimes breaking fundamental structures.