In the field of the composite images, the representation separates itself from the optical devices to become a simulated reality conceived from a principle of assembly. If we consider the image in movement, this definition makes the impasse on the schemes of mediation, which develop composite worlds where the image is never a stable data; by problematizing the systems of diffusion, by exploiting empirical processes, by freeing itself from any literary preliminary, the so-called experimental cinema reveals essentially composite spaces; the practices which are deployed there, where the relation to the material is determining, can thus agglomerate the most heterogeneous situations. The recourse to obsolete techniques or to sometimes archaic methods, is not a niche; these atypical procedures make a comeback in the computer culture, where the manual treatment of images is paradoxically rehabilitated. In fact, the digital image is not deprived of materiality and is not necessarily situated in rupture with the analogical systems. It remains that the artistic step is not in any way an enterprise of communication and that it adjusts badly to the aesthetic prescriptions; the question of the composite image is problematized here instead of being defined. It is not the processes of homogenization of disparate sources that are considered, but on the contrary the "dismounting" of the processes and the revelation of the discontinuous structure of the images.