To show Lichtraum (Hommage à Fontana) at all exhibition venues, the Museum Kunstpalast Düsseldorf decided to produce a partial exhibition copy of Weiße Lichtmühle by creating a replica of the light panel. Mack was asked to oversee the production of this partial replica, a strategy that, to some extent, continued the approach traditionally taken to maintain Lichtraum (Köhler 2013:26). The partial replica of Weiße Lichtmühle was intended to preserve and protect the current condition of the fragile light panel for the duration of the exhibitions. The artwork had been created about fifty years ago, and it was possible to discern the aging of its surfaces.