This article aims to investigate the notions of composite images and composite worlds through the prism of a research-creation project called « Dés-oeuvres de jeunesse », produced between 2017 and 2020 by artist-researchers Fanny Terno and Thomas Vauthier. The term compositing will be used to situate the heterogeneous character of video, sound, textual, photographic materials - assembled in a single frame -, that, in an encompassing smoothing that, even if put in variation, forms a plausible and composite image - based upon the dimensions of malleability and temporality as its necessary conditions.