Street art is usually associated with graffiti, a process of superimposition whereby the artist sprays or paints over some kind of publicly viewed surface, so it’s no wonder that Portuguese urban artist Alexandre Farto, who goes by the moniker VHILS, has won international acclaim for his groundbreaking bas-relief carving technique that basically does the reverse: instead of adding new layers on top of existing ones, he subtracts from what is already there.
Source: yatzer