Digital simulation is a process of calculation technologies in the goal of modelling real phenomena and proposing some mimetic or theoretical formalizations of them. The computers interfaces make appear some calculated figures that have been automatically treated by the machine. In the art field, the modelling of the symbolic forms through the computer programming and the calculated simulation seems to be a revolution for the state and the status of the representation. How is it made and where is it situated? By effect how to situate and define it, from real to virtual, from mimetism to abstraction, etc? And what is the nature of this new kind of artifice, produced by the calculation technology?