The difference between a 2D and 3D drawing is the level of depth and dimension in the drawing. A 2D drawing is a flat drawing that focuses on balance and symmetry, while a 3D drawing focuses on depth and space.
Standard 2D art focuses on the contrast, rhythm, scale and proportion of a drawing, whereas 3D art looks at the depth and sculpture or the drawing. Examples of 2D art are graphic design, digital imaging and fabric design. Examples of 3D art include animation, sculpting and metal work. The visual contrast between the two types of drawings is a 2D drawing is a flat drawing and a 3D drawing looks like it has jumped off the page.