For the installation ‘Isomatrix’ at the Kunsthal Marleen was guided by the architecture of the building, designed by Rem Koolhaas, in which she discovered elements of beauty and disorientation. By amplifying these aspects she deliberately blurred the boundaries between fiction and reality. Windows that extend into the ceiling or architectural details that are repeated; Sleeuwits transforms the experience of the space by varying with scale and adding mirrors. In the photographs of the installation shown at Unseen, the materials of the installation are reused, again creating confusion: what is part of the photograph, and what is the real material?