Holoshroud
this was a device which mimicked a pre-recorded image or appearance, allowing a being to appear to be someone - or something - else. Holoshrouds found use on the battled field to assist a being who was injured in escaping to a place of safety. The injured being could move slightly from their downed position, getting a short distance away under the protection of the shroud. When the attacker came to determine his victim's status, the victim could pounce on his attacker and surprise him. The technology was developed and refined during the New Republic, until the holoshroud could be used to cloak the true appearance of an individual during normal activity. Note that this level of technology was indicated as being available at the end of the Clone Wars in Boba Fett: A New Threat.