The different modes of visualisation found in the Delft Interviews are explored with respect to their particular advantages at specific phases of the design process, and as a means of communicating with various project stakeholders. Two main conclusions arise from this exploration. First, that with few exceptions there are no significant differences between architects and industrial designers in the way they produce and use visuals. Second, despite the proliferation of potent digital visualisation means and their willing adaptation by design practitioners, freehand sketching continues to be practised by almost all designers throughout the design process. The extraordinary cognitive advantages of sketching are outlined and it is argued that because of those advantages sketching will continue to reign in design until other means of visualisation will be capable of emulating its supremacy.