Sketching 2-D Figures 'imaginary box'

The next level that required to be polish is the technique of sketching 2-D figures is important for an artist or designer to assist him or her in better understanding of the space sketched. In this context, an artist or designer does necessarily sketching figure in detailed and complete shape but just enough to understand and make himself or herself skillful in sketching in figure roughly and sufficient to convey a message on the sketch composition itself.