Riker soon determined that he was speaking with a holographic version created by the automated weapons unit Echo Papa 607, whose purpose was to extract information from him. Upon realizing that Riker had discovered the ruse, the hologram of Rice disappeared. (TNG: "The Arsenal of Freedom")
The script for "The Arsenal of Freedom" describes the hologram of Rice as, "trim and neat, a man of Riker's age with a military bearing. He is businesslike and calm, and acts as if this kind of meeting, under these circumstances, is perfectly normal." 
In his review of the episode, Star Trek author Keith R.A. DeCandido wrote that Marco Rodriguez made, "no impression whatsoever", though concedes he did play a fake version of Paul Rice.