The UCL ReaCTor system consists of 4 projection surfaces; the front, left and right walls are back-projected acrylic screens while the painted wooden floor is projected from above. The screens are seamlessly joined to provide a continuous projection surface. Only the top and the rear faces of the cube are not projection surfaces. In addition to the near-surround visual display, 8 speakers (one at each corner of the cube) plus a separate sub-woofer provide spatialised sound.