A device for folding a reflective projection sheet, including a wall decoration including a box placed behind it, a device inside the box opening out to form a three-portion device including a first panel, a second panel, and a central false back that advances into alignment with the first and second panels when open and/or that reverses to the back of the box, a reflective projection sheet tensioned over the panels and the false back so that the sheet deploys and is tensioned when the first and second panels are open, and folds over into three portions without leaving any fold marks when the first and second panels are closed. The device presents dimensions that are relatively small, because of the way the panels fold, and does so without leaving fold marks on the sheets. The device can discreetly integrate a front projection sheet for video projectors.