Computer technology has allowed for 3D representations of projects to be shown before they are built. In some cases the construction is never started and the computer model is the nearest that anyone can ever get to seeing the finished piece. For example, in 1999 Kent Larson's exhibition ""Unbuilt Ruins: Digital Interpretations of Eight Projects by Louis I. Kahn"" showed computer images of designs completed by noted architect Louis Kahn but never built. Computer simulations can also be used to create prototypes of engineering projects and test them before they are actually made; this has allowed the design process to be more successful and efficient.