Abstract: The display system comprises a screen (1) made of an array of metal triangular facets (30) which are driven in and out by an array of pneumatic pistons (2) located behind the screen (1). The rear ends of the pistons (2) are flexibly connected by damped pivots (8) to a structural frame (7). The front ends of the pistons (2) are flexibly coupled to connection nodes between the facets (30) by connection devices (10) which have legs (13) which may splay apart as the pistons are pushed forwards. The pistons (2) may therefore be used to give the screen (1) of the facets (30) a visible 3-dimensional surface effect such as a sinusoidal deformation (101). The display system also includes an electronic control system for driving the pistons (2). The electronic control system may use a stored data file to produce a particular surface effect on the screen (1). Alternatively, the control system may respond in real-time to an input such as ambient sound, ambient lighting conditions or the like.