Visualisation is crucial to effective community participation in urban design processes because it is the only common language between all those involved. It is a language where the technical thinking and jargon of designers and the dreams of participants may find equal footing. In line with this, Martin Johansson points out, the challenge often faced in participatory design is that the “trained designer may use a pen and a piece of paper to illustrate his ideas while other stakeholders need other kinds of design material to be able to sketch”.