At some architectural schools and in some few practices, students, tutors and architects are inventing and exploring new techniques and design strategies adapted to the use of computers. In many of those cases the computer is used as a means to apply generative material in the design process. Though the arguments for doing this are many and diverse, from a perspective of design methodology such generative material is meant to produce an unanticipated output that would fertilise the design process. The use of such generative material raises a series of questions about the design process as such and the role of the designer.