Black is not a colour, some claim. Black is the strongest colour of them all, say the others. A quick glance at photographs of the BMW M4 Coupé with M Competition package taken by Instagrammer Mariano alias shadow_m4 is all you need to know which group the M enthusiast belongs to. Whether staged against a cool and monochrome backdrop or standing in strong contrast to the landscape, Mariano's BMW M4 is a supermodel in every respect. In our interview, the car lover and photographer reveals how he works and what inspires him.