A fashion sketch is the first step in bringing your fashion creations to life you can almost call it the blueprint for a design. Fashion sketches vs fashion illustrationsĮvery design begins as a sketch. Fashion illustration is considered the first step in bringing your design to fruition, and it propels the design idea from conceptualisation to realisation. It acts as the voice of the designer, communicating his/her vision to the viewer. Fashion illustration is incredibly important in fashion design, just as much as paint is to an artist, equations to a mathematician, and medicine to a doctor.