The wake imaging system (WIS) for rapid mappings of wind tunnel model flowfields is described and a summary of recent results is presented. Three different types of systems are discussed. These are: Photographic WIS in low-speed wind tunnels. Computer graphics WIS in transonic wind tunnels. Flying strut traverser for large low-speed wind tunnels. In addition, progress toward developing a low intrusive WIS for high-pressure transonic wind tunnels and for flight test applications is described.