: Adding depth (usually to one side) to give the piece a three-dimensional appearance.
In graffiti culture, there is a recognized hierarchy of skill and effort: : A quick, one-color signature. 139582 zip
To produce a "proper piece"—which in street culture refers to a complex, multi-colored that ranks above simple tags and throw-ups—you need to follow a structured artistic process. Unlike quick signatures, a piece requires significant time, planning, and skill. Elements of a Proper Piece : Adding depth (usually to one side) to